Physical and Psychosocial Benefits of Sports Participation Among Children and Adolescents with Chronic Diseases: A Systematic Review.

BACKGROUND: This study aims to identify sports interventions for children and adolescents (CaA) with chronic diseases and evaluate their impact on physical, psychological, and social well-being. The findings of this study will contribute to our understanding of the potential benefits of sports interventions for CaA with chronic diseases and inform future interventions to promote their overall health and well-being. METHODS: A systematic review was conducted in eight databases. This systematic review followed PRISMA guidelines and utilized a comprehensive search strategy to identify studies on sport-based interventions for CaA with chronic diseases. The review included randomized controlled trials and observational studies that focused on physical and psychosocial outcomes. RESULTS: We screened 10,123 titles and abstracts, reviewed the full text of 622 records, and included 52 primary studies. A total of 2352 participants were assessed with an average of 45 ± 37 participants per study. Among the included studies involving CaA with chronic diseases with an age range from 3 to 18 years, 30% (n = 15) autism spectrum disorders, 21% (n = 11) cerebral palsy, 19% (n = 10) were attention deficit hyperactivity disorder, and 17% (n = 9) obesity. Other diseases included were cancer (n = 5), asthma (n = 1) and cystic fibrosis (n = 1). Interventions involved various sports and physical activities tailored to each chronic disease. The duration and frequency of interventions varied across studies. Most studies assessed physical outcomes, including motor performance and physical fitness measures. Psychosocial outcomes were also evaluated, focusing on behavioural problems, social competencies, and health-related quality of life. CONCLUSION: Overall, sport-based interventions effectively improved physical and psychosocial outcomes in CaA with chronic diseases. Interventions are generally safe, and participants adhere to the prescribed protocols favorably. Despite that, there is little evidence that interventions are being implemented. Future studies should include interventions tailored to meet the common issues experienced by CaA with chronic conditions, providing a comprehensive understanding of the impact of sports interventions on those affected. REGISTRATION: The methodology for this review was pre-determined and registered in the PROSPERO database (registration number: CRD42023397172).

Prevalence of sports supplements consumption and its association with food choices among female elite football players.

OBJECTIVES: The present study aimed to 1) investigate the consumption of Sports Supplements (SSs) among female elite football players, 2) evaluate the influence of age on SS consumption, and 3) determine the relationship between the consumption of SSs and dietary choices among elite football players. METHODS: A total of 126 female football players of Primera Iberdrola and Reto Iberdrola who participated in this descriptive, observational, and cross-sectional study completed a self-administered questionnaire on SSs and the Athletes' Food Choices Questionnaire. RESULTS: Overall, 84.1% of participants consumed supplements, mainly for improved sports performance (68.3%) and health (34.1%). The main sources of purchase were the Internet (34.9%) and specialized shops (23.8%), and players were commonly advised by a dietitian-nutritionist to use SSs (56.3%). The SSs most often consumed included whey protein (30.2%), sports drinks (28.6%), creatine monohydrate (28.6%), sports bars (27.8%), and caffeine (27.8%). Older players consumed more supplements at the time of data compilation. Players predominantly acquired these supplements by using the Internet and reported benefits from their use (all P ≤ 0.036). Additionally, players who consumed SSs conveyed more concern about their food choices. CONCLUSIONS: A high prevalence of female football players consumed SSs, particularly SSs supported by robust scientific evidence. Older players had higher supplement consumption rates. The use of SSs was related to food choices through nutritional characteristics of foods, knowledge about health and nutrition, weight control with the help of food, and the performance benefits players could acquire.

Do Spanish Triathletes Consume Sports Supplements According to Scientific Evidence? An Analysis of the Consumption Pattern According to Sex and Level of Competition.

BACKGROUND: The use of sports supplements (SS) to improve sports performance is very common in athletes. In the case of triathletes, the physiological characteristics of the sport may require the use of certain SS. Although the consumption of SS is widespread in this sport, very few studies have investigated it thus far. The aim is to analyze the pattern of SS consumption by triathletes according to sex and the competitive level. METHODOLOGY: This is a descriptive cross-sectional study on the consumption and habitual use of SS of 232 Spanish-federated triathletes. Data were collected through a validated questionnaire. RESULTS: Overall, 92.2% of the athletes consumed SS, but no significant differences were found in terms of competition level or sex. Yet, significant differences were found regarding the level of competition for total SS (p = 0.021), the total number of Group A supplements from the AIS classification (p = 0.012), and for the ergogenic aids (p = 0.003). The most-consumed SS were bars, sports drinks, sports gels, and caffeine (83.6%, 74.1%, 61.2%, and 46.6%, respectively). CONCLUSIONS: The consumption of SS by triathletes is high, and the number of SS consumed rises from the regional to the national and international levels. The four SS most consumed were included in category A of the AIS (greatest scientific evidence).

Are the Consumption Patterns of Sports Supplements Similar among Spanish Mountain Runners?

BACKGROUND: The use of sports supplements (SS) to improve sports performance is widespread in all types of athletes, however, the specific characteristics of mountain races may require the use of certain SS. Despite being a sport where the consumption of SS seems widespread, few studies have been conducted in this regard. The objective of this study is to analyze the pattern of SS consumption of mountain runners in relation to the degree of scientific evidence, sex, and level of competition. METHODS: Descriptive and cross-sectional study on the consumption and habitual use of SS of 357 federated mountain runners in Spain. Data were collected through a validated questionnaire. RESULTS: From the total sample, 93.84% of the athletes stated that they consumed SS, with no differences observed based on the competitive level or in terms of sex; however, there were significant differences according to the competitive level in terms of the number of SS consumed, with consumption being greater at a higher competitive level (p = 0.009). The most consumed SS were sports bars (66.1%), sports drinks (60.5%), sports gels (52.9%), and caffeine (46.2%). CONCLUSIONS: The consumption of SS in mountain races is high, and the number of SS consumed is higher as the competition level increases. The four SS most consumed by the participants in this study were all included in category A in the classification of the Australian Institute of Sport (AIS), this category is the one with the greatest scientific evidence.

Anthropometric characteristics of young elite sailors based on performance level.

Background: /Objectives: The aim of the present study was to analyse possible differences in anthropometric characteristics of elite sailors based on categories and performance level. Methods: ː A total of 42 young (aged 12-18 years) elite sailors (men = 31; women = 11) of the Monohull (n = 21) and Windsurfing (n = 21) categories composed the study sample. Testing was per-formed in one session the day before the start of an official and international competition. Body composition was measured using an octopolar and multi-frequency electrical bioimpedance analyser, and height was recorded using a telescopic measuring instrument. Cross-sectional study. The total sample was divided into two groups based on their performance level (ranking), 50th percentile (P1), and 100th percentile (P2). Results: ː P1 presented a lower BMI, total body fat mass, and body fat mass in the trunk, arms, and legs (p < 0.05). Similarly, P1 reported a higher total body muscle mass and body muscle mass on the trunk, arms, and legs compared to the less level performance group (p < 0.05). In addition, P2 sailors were taller and heavier (p < 0.05). Regarding categories, the Windsurf sailors presented statistically significantly lower arm fat mass than the Monohull (p < 0.05). The Windsurf sailors showed differences between the two performance-level groups (p < 0.05). Additionally, comparing the high-level performance group in both categories, higher arm muscle mass on the Windsurfing sailors was detected (p < 0.05). Conclusions: ː These findings could help to differentiate the anthropometric variables that determine sport performance in young elite sailors and could be used to differentiate the anthropometric variables in each category.

Analysis of Sports Supplement Consumption in 1688 Federated Road Cyclists.

The widespread use of sports supplements (SS) to enhance athletic performance extends to cyclists, although little research has been conducted on this subject within this sport. This descriptive and cross-sectional study involved 1688 federated road cyclists, aiming to analyse the pattern of SS consumption concerning the degree of scientific evidence and different categories. This study categorised SS based on the groups and subgroups established by the Australian Sport Institute (AIS, 2023) based on the level of evidence. Our results showed that 62.5% of the sample cyclists used SS, with an average of 12.2 ± 8.6 supplements consumed per participant. Health status (78.2%), pharmacies (62.5%), and medical doctors (45.7%) were the main reasons, purchase sites, and sources of information for SS consumption, respectively. The most prevalent SS consumed were Sports Gels (94%), Sports Bars (89.3%), and Sports Drinks (73.8%). Notably, 80% of the top ten most consumed SS belonged to the group with the highest level of evidence according to the AIS, with an average of 6.9 ± 3.2 supplements per participant. However, 23.3% of the total SS consumers used prohibited substances. In conclusion, while the prevalence of SS consumption among road cyclists is considerable and the primary sources for purchasing SS and obtaining advice are reliable, there is a notable prevalence of prohibited substance use within the sample.

Analysis of the Consumption of Sports Supplements in Open Water Swimmers According to the Competitive Level.

BACKGROUND: Sports supplements (SS) are widely consumed by many types of athletes to improve their performance. These SS are classified according to their level of scientific evidence, by the ABCD system from the Australian Institute of Sport (AIS). In open water swimming, their use may be necessary due to the physiological challenges posed by this sport discipline. However, there is currently little literature on the use of SS in open water swimmers. The aim of this work is to analyze the pattern of consumption of SS by open water swimmers, by studying the differences according to the competitive level (regional vs. national). METHODS: Descriptive and cross-sectional study on the consumption and use of SS by federated open water swimmers in Spain in the 2019/2020 and 2020/2021 seasons. The data were collected through a validated questionnaire. RESULTS: 79.5% of the participants consumed SS, with significant differences according to their level, being higher in athletes at the national level. The most-consumed SS by the swimmers studied were sports drinks, energy bars, caffeine, vitamin C, and vitamin D. CONCLUSIONS: It was observed that the consumption of SS in open water swimmers was high, and of the five most-consumed SS, four of them belonged to the category of greatest scientific evidence.

Sports supplements use in mountain runners: differences by sex and competitive level.

Introduction: Introduction: sports supplements (SS) are widely used by all types of athletes to improve their performance. These SS are classified according to the ABCD system of the Australian Institute of Sports (AIS) from higher to lower scientific evidence. In mountain runners, their use could be necessary due to the physiological demands required by this sport. However, the literature on the use of SS by mountain runners is scarce. Objective: to analyze the pattern of SS consumption in mountain runners by studying differences according to sex and competitive level (regional vs national). Methodology: this was a descriptive and cross-sectional study on the consumption and use of SS by mountain runners participating in the Alcoy Solidarity Trail. Data were collected through a validated questionnaire based on content, applicability, structure, and presentation. This questionnaire was completed online by the athletes, who could fill it out voluntarily and at their convenience, as well as anonymously. Results: the results showed that 87.5 % of participants reported consuming SS, with no significant differences observed with respect to competitive level, although differences were found with respect to sex (92.7 % in men vs 70.6 % in women; p = 0.029), with a higher consumption found in men compared to women. The most consumed SS were sports bars (81.9 %), sports drinks (75.0 %), caffeine (48.6 %), magnesium (38.9 %), and electrolytes (27.8 %). Conclusions: among mountain runners consumption of SS is high, and 4 of the 5 most habitually consumed SS belong in the category of greater scientific evidence.

Introducción: Introducción: los suplementos deportivos (SS) son muy utilizados por todo tipo de deportistas para mejorar su rendimiento. Estos SS se clasifican según el sistema ABCD del Australian Institute of Sports (AIS) de mayor a menor evidencia científica. En corredores de montaña, su uso podría ser necesario debido a las exigencias fisiológicas de este deporte. Sin embargo, la literatura sobre el uso de SS por corredores de montaña es escasa. Objetivo: analizar el patrón de consumo de SS en corredores de montaña, estudiando las diferencias según el sexo y el nivel competitivo (autonómico vs. nacional). Metodología: se trata de un estudio descriptivo y transversal sobre el consumo y uso de SS por parte de los corredores de montaña participantes en el Trail Solidario de Alcoy. Los datos fueron recolectados a través de un cuestionario validado en base al contenido, la aplicabilidad, la estructura y la presentación. El cuestionario fue completado de manera online por los atletas que pudieron rellenarlo voluntariamente y a conveniencia, y de manera anónima. Resultados: los resultados mostraron que el 87,5 % de los participantes reportaron consumir SS, no observándose diferencias significativas con respecto al nivel competitivo, aunque sí se encontraron diferencias con respecto al sexo (92,7 % en hombres y 70,6 % en mujeres; p = 0,029), donde los hombres tenían un mayor consumo en comparación con las mujeres. Los SS más consumidos fueron las barritas deportivas (81,9 %), las bebidas deportivas (75,0 %), la cafeína (48,6 %), el magnesio (38,9 %) y los electrólitos (27,8 %). Conclusiones: entre los corredores de montaña, el consumo de SS es alto y 4 de los 5 SS más consumidos pertenecen a la categoría de mayor evidencia científica.

Sports supplements use in mountain runners: differences by sex and competitive level / Consumo de suplementos deportivos en corredores de montaña: diferencias en función del sexo y del nivel competitivo

Introduction: sports supplements (SS) are widely used by all types of athletes to improve their performance. These SS are classified according to the ABCD system of the Australian Institute of Sports (AIS) from higher to lower scientific evidence. In mountain runners, their use could be necessary due to the physiological demands required by this sport. However, the literature on the use of SS by mountain runners is scarce. Objective: to analyze the pattern of SS consumption in mountain runners by studying differences according to sex and competitive level (regional vs national). Methodology: this was a descriptive and cross-sectional study on the consumption and use of SS by mountain runners participating in the Alcoy Solidarity Trail. Data were collected through a validated questionnaire based on content, applicability, structure, and presentation. This questionnaire was completed online by the athletes, who could fill it out voluntarily and at their convenience, as well as anonymously. Results: the results showed that 87.5 % of participants reported consuming SS, with no significant differences observed with respect to competitive level, although differences were found with respect to sex (92.7 % in men vs 70.6 % in women; p = 0.029), with a higher consumption found in men compared to women. The most consumed SS were sports bars (81.9 %), sports drinks (75.0 %), caffeine (48.6 %), magnesium (38.9 %), and electrolytes (27.8 %). Conclusions: among mountain runners consumption of SS is high, and 4 of the 5 most habitually consumed SS belong in the category of greater scientific evidence. (AU)

Introducción: los suplementos deportivos (SS) son muy utilizados por todo tipo de deportistas para mejorar su rendimiento. Estos SS se clasifican según el sistema ABCD del Australian Institute of Sports (AIS) de mayor a menor evidencia científica. En corredores de montaña, su uso podría ser necesario debido a las exigencias fisiológicas de este deporte. Sin embargo, la literatura sobre el uso de SS por corredores de montaña es escasa. Objetivo: analizar el patrón de consumo de SS en corredores de montaña, estudiando las diferencias según el sexo y el nivel competitivo (autonómico vs. nacional). Metodología: se trata de un estudio descriptivo y transversal sobre el consumo y uso de SS por parte de los corredores de montaña participantes en el Trail Solidario de Alcoy. Los datos fueron recolectados a través de un cuestionario validado en base al contenido, la aplicabilidad, la estructura y la presentación. El cuestionario fue completado de manera online por los atletas que pudieron rellenarlo voluntariamente y a conveniencia, y de manera anónima. Resultados: los resultados mostraron que el 87,5 % de los participantes reportaron consumir SS, no observándose diferencias significativas con respecto al nivel competitivo, aunque sí se encontraron diferencias con respecto al sexo (92,7 % en hombres y 70,6 % en mujeres; p = 0,029), donde los hombres tenían un mayor consumo en comparación con las mujeres. Los SS más consumidos fueron las barritas deportivas (81,9 %), las bebidas deportivas (75,0 %), la cafeína (48,6 %), el magnesio (38,9 %) y los electrólitos (27,8 %). Conclusiones: entre los corredores de montaña, el consumo de SS es alto y 4 de los 5 SS más consumidos pertenecen a la categoría de mayor evidencia científica. (AU)

Dietary Supplement Use of Turkish Footballers: Differences by Sex and Competition Level.

This study aimed to evaluate the consumption of dietary supplements (DS) and to determine related topics in Turkish football players of different sexes and competition levels. A total of 117 footballers (79 males and 38 females) completed a specific survey regarding DS consumption in athletes. The type of DS ingested was classified based on the level of scientific evidence by the Australian Institute of Sport (AIS): group A (high level of scientific evidence), group B (DS that could have a positive effect, but require more evidence), group C (evidence is against their use), and group D (prohibited substances). After a Kolmogorov−Smirnov test, a t-test or Mann−Whitney U test was performed for quantitative variables, while Pearson's chi-square and odds ratio (with the confidence interval) were performed for qualitative variables. Of the sample, 87.2% reported having consumed DS, with a higher consumption rate in males (males: 93.7%, females: 73.7%; p = 0.006; OR = 5.3 [1.7−16.8]) and professional players (professional: 98.2%, non-professional: 77.4%; p < 0.001; OR = 7.9 [1.2−52.3]). Males and professional players consume more sports foods (p < 0.001), performance supplements (p < 0.001), and total group A supplements (p < 0.001) compared to females and non-professionals. In addition, males consume more medical supplements (p = 0.012) and total group C supplements (p < 0.001) than female footballers. The most consumed DS were sports drinks (63.2%), magnesium (52.1%), vitamin C (51.3%), vitamin D (46.2%), caffeine (38.5%), sports bars (37.6%), whey protein (28.2%), meat protein (25.6%), vitamin E (24.8%), and omega-3 fatty acids (24.8%). The supplement consumption was higher in male and professional footballers. According to the AIS classification, there were significant differences in the consumption of sports foods, medical supplements, performance supplements, and the total number of group A and group C supplements according to sex, and there were significant differences in the consumption of sports foods, performance supplements, and the total number of group A supplements according to competition level.

Effects of ß-Hydroxy ß-Methylbutyric Supplementation in Combination with Conservative Non-Invasive Treatments in Athletes with Patellar Tendinopathy: A Pilot Study.

The aim of the present study was to analyze the effect of conservative non-invasive treatments based on eccentric training, stretching and extracorporeal shock wave therapy (ESWT) supplemented with ß-Hydroxy ß-methylbutyric (HMB) or placebo (PLAC) on body composition, pain and muscular function (jump ability, muscular power and muscular strength) in athletes with patellar tendinopathy (PT). In a double-blind randomized trial, 8 athletes (4 males and 4 females) performed a physical rehabilitation for 4 weeks. They were randomly divided into two experimental groups (two males and two females in each one) that ingested HMB (HMBG) or PLAC (PLACG). In pre- and post-intervention were assessed body composition, pain, countermovement jump (CMJ), back-squat (BS) for analyzing peak power (W) (PPPP), load (kg) associated to PPPP (PPKG) and mean velocity (m/s) (PPMV) in addition to a 5-RM leg extension tests. An interaction intervention·supplementation (p = 0.049; È 2p = 0.774) was observed in the height reached in the CMJ as an intervention effect in PPPP detected for the HMBG (p = 0.049). In addition, an enhancement in PPKG (p = 0.028; È 2p = 0.842) was detected in the intervention, but not in PPMV, as an increase in the intervention in the 5-RM test (p = 0.001; È 2p = 0.981) was observed. No changes were noted on body composition or pain (p > 0.05). The combination of eccentric training with stretching and ESWT increased concentric muscular power and strength after 4 weeks without changes in body lean mass or pain. In addition, HMB supplementation could enhance the power muscular performance in athletes with PT, optimizing the intervention adaptions.

Key performance indicators of Olympic windsurfers during a World Cup: RS:X class®.

The aim of this study was to analyse differences in velocity, distance travelled and manoeuvres performed by Olympic sailors of the RS:X class using a GPS device. Fifty-three Olympic sailors of the RS:X class (28 males and 25 females) who competed in a World Championship were selected. The sample was divided into tertiles (T1, T2 and T3) according to their classification in the competition. Using a GPS device during the competition, mean velocity (VM), velocity made good (VMG), manoeuvres and distances in three different courses (upwind, reaching and downwind) were assessed during a regatta. Significant differences were found based on performance level in upwind (p < 0.001; ηp2 = 0.288), sailors of T1 covering a shorter distance compared to those of T2 (p < 0.009) and T3 (p < 0.001). Regarding VMG, an effect was observed for performance level in upwind (p < 0.001; ηp2 = 0.718), reaching (p < 0.001; ηp2 = 0.469) and downwind (p < 0.001; ηp2 = 0.575). Females covered a shorter distance compared to the males in upwind (p < 0.001; ηp2 = 0.639) and downwind (p < 0.001; ηp2 = 0.903). Distance and VMG are significant variables for establishing differences in performance level among Olympic sailors of the RS:X class when the wind speed is in a range of 8-21 knots.

Consumo de suplementos deportivos en remeros universitarios / Consumo de suplementos esportivos em remadores universitários / Consumption of sports supplements in university rowers

Introducción: El uso de suplementos deportivos (SD) es muy común entre los atletas y durante los últimos años la prevalencia de su consumo ha ido aumentando. Sin embargo, no todos los SD proporcionan los beneficios que se busca cuando se decide consumir este tipo de sustancias. Es por ello que las entidades científicas han puesto su foco en la evaluación de SD y se han creado clasificaciones en función de la evidencia científica, como la que ha propuesto el Instituto Australiano del Deporte (AIS). Los remeros de élite realizan sesiones de entrenamiento centradas en el desarrollo de la capacidad aeróbica y anaeróbica, así como entrenamientos defuerza, por lo que la utilización de SD adecuados puede mejorar el rendimiento de estos deportistas.Objetivo: Determinar la prevalencia de consumo de SD en remeros de élite universitarios y evaluar el grado de evidencia del SD consumido.Método: Estudio descriptivo y transversal en el que han participado 14 remeros del equipo de remo de la Universidad de Alicante. Se utilizó un cuestionario, previamente validado, para recoger los datos pertinentes al consumo de SD.Resultados: Los SD más consumidos fueron: cafeína (81%), proteína de suero (75%), creatina monohidrato (62,5%), barritas energéticas (56,3%), bebida isotónica (50%) y BCAA (43,7%). La finalidad principal de su uso fue para mejorar el rendimiento deportivo y solo un 33% estaba asesorado por un dietista-nutricionista.Conclusión: La mayoría de los SD utilizados por los remeros tienen respaldo científico. Por lo que sería interesante que se llevasen a cabo más investigaciones en esta población. (AU)

Introduction: The use of sports supplements (SD) is very common among athletes. In recent years the prevalence of consumption has been increasing. However, not all SD provide the benefits that we are find when we deciding to use this type of substance. That is why scientific entities have been its focus in the evaluation of SD and classifications have been created for scientific evidence, as well as in the Australian Institute of Sport (AIS). The elite rowers training activities focused on the development of aerobic and anaerobic capacity and strength traininig, so the use of suitable SD could improve the performance of these athletes.Objective: Determine the prevalence of SD consumption in university rowers and to evaluate the grade of evidence of SD consumption.Method: Descriptive and transversal study in which have participated 14 rowers that shape the University of Alicante’s rower team. A previously validated questionnaire was applied to collect the data about SD consumption.Results: The SD most consumed were: caffeine (81%), whey protein (75%), creatine monohydrate (62.5%), energy bars (56.3%), isotonic drink (50%) and BCAA (43, 7%). The main purpose of its use was to improve athletic performance, and only 33% were advised by a dietitian-nutritionist.Conclusion: Most SD that rowers used have scientific support. So, it would be interesting if more research were carried out in this population. (AU)

Introdução: O uso de suplementos esportivos (DS) é muito comum entre atletas e nos últimos anos a prevalência de seu consumo vem aumentando. No entanto, nem todos os DSs fornecem os benefícios que se buscam ao decidir consumir esses tipos de substâncias. É por isso que as entidades científicas têm se voltado para a avaliação do DS e têm sido criadas classificações com base em evidências científicas, como a proposta pelo Australian Institute of Sport (AIS). Os remadores de elite realizam sessões de treinamento com foco no desenvolvimento da capacidade aeróbia e anaeróbia, além do treinamento de força, de forma que o uso de DS adequado pode melhorar o desempenho desses atletas.Objetivo: Determinar a prevalência do consumo de DS em remadores universitários de elite e avaliar o grau de evidência do consumo de DS.Método: Estudo descritivo e transversal do qual participaram 14 remadores da equipe de remo da Universidade de Alicante. Um questionário previamente validado foi usado para coletar dados pertinentes ao consumo de SD.Resultados: Os DSs mais consumidos foram: cafeína (81%), proteína de soro de leite (75%), creatina monohidratada (62,5%), barras energéticas (56,3%), bebida isotônica (50%) e BCAA (43,7%). O principal objetivo de seu uso era melhorar o rendimento esportivo e apenas 33% foram orientados por nutricionista-nutricionista.Conclusão: A maioria dos DSs utilizados pelos remadores possuem respaldo científico. Portanto, seria interessante se mais pesquisas fossem realizadas nesta população. (AU)

Fraude en suplementos nutricionales para deportistas: revisión narrativa / Fraud in nutritional supplements for athletes: a narrative review

El uso de suplementos nutricionales (SN) es una práctica muy extendida tanto entre los deportistas profesionales como entre los amateurs. Su elección debe realizarse basándose en criterios de seguridad, legalidad y eficacia. Son varios los riesgos que algunos de estos productos pueden desencadenar, siendo motivo de fraude para el consumidor. A modo de ejemplo, la presencia de una sustancia legal en dosis superiores a sus recomendaciones puede ocasionar efectos secundarios indeseados; por el contrario, su presencia en cantidades inferiores a las necesarias (umbral efectivo) puede no provocar el efecto esperado o anunciado por el producto. Por ello, el objetivo de la presente revisión es describir la existencia de fraude en relación con el etiquetado nutricional y/o el contenido de los SN destinados a deportistas. Se realizó una revisión narrativa a través de Pubmed en la que 16 estudios cumplieron los criterios de inclusión. Los resultados muestran que el etiquetado nutricional difiere de la cantidad real de ingredientes. Este tipo de fraude se ha encontrado en suplementos de proteína en polvo, mezclas preentrenamiento, creatina y bebidas que contienen vitaminas y minerales, entre otros. El fraude debido a errores en el etiquetado, por omisión de sustancias presentes en el producto o por errores en el análisis o declaración de las cantidades, es alto. Esta falta de transparencia en la composición real del etiquetado puede contribuir a problemas de rendimiento deportivo y/o de salud en el deportista. Por lo tanto, es necesaria una mejora de la legislación de los SN para garantizar su seguridad, eficacia y legalidad. (AU)

The use of nutritional supplements (NSs) is a widespread practice in both professional and amateur athletes. Their choice must be based on criteria of safety, legality, and effectiveness. There are several risks that some of these products can trigger, this being a reason for fraud to the consumer. By way of example, the presence of a legal substance in doses higher than its recommendation may cause unwanted side effects; on the other hand, its presence in quantities lower than necessary (effective threshold) may not have the effect expected or announced by the product. Therefore, the objective of this review was to describe the existence of fraud in relation to nutritional labeling and/or to the content of NSs intended for athletes. A narrative review was conducted through PubMed in which 16 studies met the inclusion criteria. The results show that nutritional labeling differs from the actual amounts of ingredients. This type of fraud has been found in protein powder supplements, pre-workout mixtures, creatine, and beverages containing vitamins and minerals, among others. Fraud due to errors in the labeling by omission of substances present in the product or by errors in the analysis or declaration of quantities, is high. This lack of transparency in the actual composition of labels can contribute to sports performance and/or health problems in the athlete. Therefore, an improvement of the legislation on NS is necessary to ensure their safety, effectiveness, and legality. (AU)

[Fraud in nutritional supplements for athletes: a narrative review]. / Fraude en suplementos nutricionales para deportistas: revisión narrativa.

INTRODUCTION: The use of nutritional supplements (NSs) is a widespread practice in both professional and amateur athletes. Their choice must be based on criteria of safety, legality, and effectiveness. There are several risks that some of these products can trigger, this being a reason for fraud to the consumer. By way of example, the presence of a legal substance in doses higher than its recommendation may cause unwanted side effects; on the other hand, its presence in quantities lower than necessary (effective threshold) may not have the effect expected or announced by the product. Therefore, the objective of this review was to describe the existence of fraud in relation to nutritional labeling and/or to the content of NSs intended for athletes. A narrative review was conducted through PubMed in which 16 studies met the inclusion criteria. The results show that nutritional labeling differs from the actual amounts of ingredients. This type of fraud has been found in protein powder supplements, pre-workout mixtures, creatine, and beverages containing vitamins and minerals, among others. Fraud due to errors in the labeling by omission of substances present in the product or by errors in the analysis or declaration of quantities, is high. This lack of transparency in the actual composition of labels can contribute to sports performance and/or health problems in the athlete. Therefore, an improvement of the legislation on NS is necessary to ensure their safety, effectiveness, and legality.

INTRODUCCIÓN: El uso de suplementos nutricionales (SN) es una práctica muy extendida tanto entre los deportistas profesionales como entre los amateurs. Su elección debe realizarse basándose en criterios de seguridad, legalidad y eficacia. Son varios los riesgos que algunos de estos productos pueden desencadenar, siendo motivo de fraude para el consumidor. A modo de ejemplo, la presencia de una sustancia legal en dosis superiores a sus recomendaciones puede ocasionar efectos secundarios indeseados; por el contrario, su presencia en cantidades inferiores a las necesarias (umbral efectivo) puede no provocar el efecto esperado o anunciado por el producto. Por ello, el objetivo de la presente revisión es describir la existencia de fraude en relación con el etiquetado nutricional y/o el contenido de los SN destinados a deportistas. Se realizó una revisión narrativa a través de Pubmed en la que 16 estudios cumplieron los criterios de inclusión. Los resultados muestran que el etiquetado nutricional difiere de la cantidad real de ingredientes. Este tipo de fraude se ha encontrado en suplementos de proteína en polvo, mezclas preentrenamiento, creatina y bebidas que contienen vitaminas y minerales, entre otros. El fraude debido a errores en el etiquetado, por omisión de sustancias presentes en el producto o por errores en el análisis o declaración de las cantidades, es alto. Esta falta de transparencia en la composición real del etiquetado puede contribuir a problemas de rendimiento deportivo y/o de salud en el deportista. Por lo tanto, es necesaria una mejora de la legislación de los SN para garantizar su seguridad, eficacia y legalidad.

Acute Effects of Caffeine Intake on Psychological Responses and High-Intensity Exercise Performance.

OBJECTIVE: The aim of this study was to investigate the effects of caffeine supplementation on: (i) psychological responses of subjective vitality and mood; (ii) performance through a Wingate test; and (iii) rate of perceived exertion (RPE) reported after a Wingate test. METHODS: Fifteen male participants (22.60 ± 2.16 years) ingested 6 mg·kg-1 of caffeine or placebo (sucrose) supplementation in two experimental sessions. After 60 min from supplement intake, participants fulfilled two questionnaires, which measured subjective vitality and mood state, respectively. Subsequently, participants' performance was assessed through a Wingate test, which was followed by measurements of RPE at general, muscular, or cardiovascular level. RESULTS: Caffeine supplementation increased some components of mood, as assessed by profile of mood states (POMS) (tension and vigor dimensions) and subjective vitality profiles, which were followed by a greater maximum power, average power, and lower time needed to reach maximum power during the Wingate test. Moreover, lower RPE, both at muscular and general levels were reported by participants after the Wingate test. CONCLUSIONS: These results suggest that caffeine supplementation exerts positive effects both in psychological and physical domains in trained subjects.

Analysis of Sport Supplement Consumption and Body Composition in Spanish Elite Rowers.

The aim of this study was to analyze the anthropometric characteristics and sport supplement (SS) consumption patterns of heavyweight and lightweight international rowers. Methods: The 13 heavyweights (11 males) and seven lightweights (five males) of the Spanish National Rowing Team were recruited for the study. Body composition was measured by bio-impedance analysis, and the questionnaire used in this investigation was previously validated to assess SS consumption. According to anthropometrics parameters, it was reported that male heavyweight rowers were heavier (p < 0.001) and taller (p < 0.001), but no statistical differences were reported for % body fat (p = 0.104) or % lean body mass (p = 0.161). All rowers reported consumption of at least one SS. Based on the Australian Institute of Sport's classification, higher medical supplement consumption was observed when comparing heavyweight rowers to lightweight rowers (2.5 ± 1.1 vs. 1.7 ± 0.5, p = 0.040). There were no differences in the totals of group A (strong scientific evidence for sports scenarios, p = 0.069), group B (emerging scientific support, deserving of further research, p = 0.776), or group C (scientific evidence not supportive of benefit and/or security amongst athletes, p = 0.484). The six most consumed SSs were iron (85%), caffeine (85%), ß-alanine (85%), energy bars (85%), vitamin supplements (80%), and isotonic drinks (80%), with no statistical differences between heavyweight and lightweight rowers (p > 0.05). These results suggest that the absence of differences in body composition (expressed as a percentage) do not represent anthropometric disadvantages for heavyweight rowers. In addition, SS consumption was similar between rowers, reporting only higher medical supplement consumption in heavyweight rowers.

A Survey on Dietary Supplement Consumption in Amateur and Professional Rugby Players.

PURPOSE: the aim of the present study was to analyse the pattern of dietary supplements (DS) consumption on federated rugby players, including the analysis of differences based on the sex and competitive level (professional vs. amateurs). MATERIAL AND METHODS: 144 rugby players (83 male and 61 female), of whom 69 were professionals and 75 amateurs, were recruited for the study. All the participants filled out a specific questionnaire about DS consumption including questions related to the consumption of DS and their effects on sport performance and health status. RESULTS: 65.3% of participants declared consuming at least one DS, with a higher prevalence in males than females (77.1% vs. 49.2%) and in professionals thanin amateur players (79.7% vs. 52.0%). The main reason for consumption was to enhance sport performance (62.3%) with differences only based on sex (74.3% males vs. 43.2% females). The most common purchase sites were the Internet (45.6%) and specialised stores (39.8%). As to the moment of ingestion, professionals did this most frequently during competition and training (56.4% vs. 28.2%), whereas amateur players did so only during competition (20.5% vs. 3.6%). Moreover, professional player intake most frequently in post-exercise (65.5% vs. 35.9%), whereas amateur during pre-exercise (30.8% vs. 5.5%). The DS most consumed included whey protein (44%), caffeine (42%), sports drinks (38%), energy bars (34%) and creatine monohydrate (31%), with a higher prevalence in male and professional players of whey protein and creatine monohydrate. CONCLUSIONS: The main reason for DS consumption is for enhancing sports performance). Professional players more frequently purchase them on the Internet and consume DS during training and competition period and in the post-exercise, whereas amateur players consume during competition and pre-exercise. Related to the main form of DS consumption, it is observed that a moderate consumption of DS could be considered ergogenic, such as whey protein, sport bar and creatine, while an absence of other DS could be considered ergogenic.

Importance-Performance Matrix Analysis (IPMA) to Evaluate Servicescape Fitness Consumer by Gender and Age.

The fitness sector has always been linked to the analysis of the loyalty of its consumers. Different studies have shown the importance of sports service and human resources for greater customer loyalty. However, few works have studied how the physical environment or servicescape influences the behavior of consumers in fitness centers based on gender and age. Therefore, the objective of the study was to analyze the relationship between servicescape and the loyalty of fitness center consumers, analyzing through the Importance-Performance Matrix Analysis (IPMA) what the aspects to improve according to gender and age are. The sample was 10,368 fitness center customers (5864 women and 4504 men). After the IPMA, it was concluded that the main improvement margins in general in fitness centers were the equipment and the facility condition, and the facility layout. In turn, in relation to gender and age, the aspects with room for improvement were to a greater extent for equipment and facility condition in women over 21 years of age, and in facility layout for women between 21 and 40 years old and 51-60 years old. Regarding men, the aspects with the highest performance margins were the equipment and facility condition in all the age groups, the facility layout in men up to 50 years old, and the signage in men up to 40 years old and from 51 to 60 years old.

Changes in Lipoinflammation Markers in People with Obesity after a Concurrent Training Program: A Comparison between Men and Women.

Obesity is related to low-grade systemic inflammation. This state of inflammation is characterized by the alteration in adipokine regulation, which may lead to a situation of cardiometabolic risk. The aim of this study was to evaluate the effects of a concurrent training program on markers of lipoinflammation in adult people with obesity, comparing the response to the training between men and women. A quasi-experimental, quantitative, and longitudinal study with a pre-post intervention was conducted. An 8-week concurrent training program was carried out, in which 26 individuals with obesity participated (mean ± SD; age = 46.38 ± 4.66) (BMI = 36.05 ± 4.99) (12 men and 14 women). Before and after the intervention period, blood samples were taken by percutaneous puncture. The blood levels of adiponectin and leptin were evaluated. Significant differences were obtained in the adiponectin-leptin ratio (A/L ratio) of the entire sample (p = 0.009, ES = 0.53), which indicates a decrease in the risk of cardiovascular diseases and lipoinflammation. There were no significant differences in the improvements observed after the training in A/L ratio between women (A/L change = +63.5%) and men (A/L change= +59.2%). It can be concluded that the combination of aerobic exercise and resistance training induced an improvement in markers of lipoinflammation and cardiometabolic risk in the individuals with obesity evaluated in this study.