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1.
Artículo en Inglés | MEDLINE | ID: mdl-36834162

RESUMEN

Activities of daily living (ADL) may be limited by the presence of chronic diseases, and limitations in ADL contribute to an increased risk of falling. In people with asthma, chronic obstructive pulmonary disease (COPD), and asthma-COPD overlap (ACO), ADL may be affected owing to poor asthma control and COPD ventilatory limitations. The aim of this study was to establish the differing prevalence of limitations in ADL among older Spanish adults with chronic respiratory diseases (COPD, asthma, and ACO). Data from the Spanish National Health Survey were analyzed. The sample was composed of 944 older adults aged ≥65 years and with a positive diagnosis of COPD (n = 502), asthma (n = 241), or ACO (n = 201). Five basic activities of daily living (BADL) and seven instrumental activities of daily living (IADL) were studied. Frequency and percentages were used to describe sample characteristics and limitations of ADL. Significant differences were analyzed using chi-square tests. Results revealed a significant higher number of older adults with COPD (34.8%) and asthma (32.5%) without limitations in doing hard housework in comparison to ACO (17.8%). Regarding meal preparation, a higher percentage of asthmatics without difficulties (77.7%) and a lower percentage with many difficulties (2.6%) were observed in comparison to ACO (64.8%-10.2%). No differences were found in BADL, with approximately 80-90% without limitations. It seems that limitations in IADL vary according to the type of chronic pulmonary diseases, but further research is needed to clarify why differences were found only for preparing meals and hard housework. These findings should be considered in the design of interventions to promote ADL in older adults with respiratory disease.


Asunto(s)
Asma , Enfermedad Pulmonar Obstructiva Crónica , Humanos , Anciano , Actividades Cotidianas , España , Enfermedad Pulmonar Obstructiva Crónica/epidemiología , Asma/epidemiología , Prevalencia
2.
J Asthma ; 59(5): 917-925, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-33567915

RESUMEN

OBJECTIVES: To identify levels of physical activity (PA) among the Spanish population with asthma and chronic obstructive pulmonary disease overlap (ACO). A further aim was to analyze differences in PA levels by sex, age, education, marital status, cohabiting, smoking habits, alcohol consumption and body mass index (BMI). METHODS: In this cross sectional study, data from the Spanish National Health Survey 2017 were analyzed. A total of 198 people with ACO aged 15-69 years were included in the analyses. The short version of the international physical activity questionnaire (IPAQ) was used to measure total PA (MET·min/week). PA was further classified as low, moderate and high, and analyzed according to sample characteristics. Data were analyzed using the Mann-Whitney U test, Kruskal-Wallis H test and chi squared test. Statistical significance was set at p < 0.05. RESULTS: People with ACO engaged in a mean volume of 2038.1 MET·min/week. Those aged 30-60 years and those with normal weight were significantly more active than those aged ≥60 and those with obesity. When classifying PA level in low, moderate and high, results showed no significant differences between sample characteristics. Overall, moderate and high levels of PA were the most and least frequent levels (48.0% and 16.2%, respectively). CONCLUSIONS: More than three out of ten Spanish adults with ACO do not achieve PA recommendations. Therefore, it is recommended to implement programs that promote the importance and benefits of PA among the Spanish population with ACO, and such programs should focus on older adults and those who are obese.


Asunto(s)
Asma , Enfermedad Pulmonar Obstructiva Crónica , Anciano , Asma/epidemiología , Estudios Transversales , Ejercicio Físico , Humanos , Obesidad/epidemiología , Enfermedad Pulmonar Obstructiva Crónica/epidemiología , España/epidemiología
3.
Children (Basel) ; 10(1)2022 Dec 28.
Artículo en Inglés | MEDLINE | ID: mdl-36670619

RESUMEN

Childhood motor competence plays a fundamental role in long-term adherence to physical activity. Enjoyment levels and self-perception of physical fitness increase motivation, commitment, and participation in physical activity. The objective of this study was to assess the body mass index (BMI), weight percentile, health status, physical fitness, and enjoyment levels of physical activity. A sample of 138 persons, of whom 67 were males and 71 females, with a mean BMI of 20.04 (2.35) answered the questionnaires Physical Activity Enjoyment Scale and the International Fitness Scale−self-report of physical fitness in young people. Tests were administered to measure functional fitness and anthropometric characteristics. Statistical analysis included calculation of Cronbach's alpha, ANOVA and Pearson's bivariate test correlations. The data indicate the reliability of the International Fitness Scale. No significant differences by gender were observed for the Physical Activity Enjoyment Scale. The BMI showed that significant positive correlations with 20 m sprint scores (p < 0.001, r = 0.367) and significant negative correlations with 6-minute lap scores (p < 0.001, r = −0.360) could be caused by an older physiological age. The overall physical fitness level of the children was medium-high, with most of the children enjoying physical education classes and slightly higher enjoyment values for males 40.88 (5.42) than females 40.31 (6.16).

4.
Artículo en Inglés | MEDLINE | ID: mdl-34948909

RESUMEN

The objective of this study was to evaluate the psychometric properties, in terms of validity and reproducibility, of the Golf Course Quality Scale (GCQS) in the Spanish golf course context. The GCQS is a scale that measures the quality of a golf course perceived by its users. It is comprised of 22 five-point Likert scale items, ranging from 1 (disagree) to 5 (totally agree). The items were grouped into five dimensions: services, etiquette, facilities, golf courses, and staff. A translated and adapted version of the Australian CQS questionnaire was administered to a total of 401 federated golf players in the Region of Murcia (RM). The margin of error was 4.9% with a confidence level of 95%. Of the total sample, 88.5% were men and 11.5% were women. The participants were between the ages of 18 and 80 (M = 54.1, SD = 14.3). Following an exploratory factor analysis (EFA) to determine the suitability of the proposed items and the factorial structure of the scale, a confirmatory factor analysis (CFA) was performed using structural equations under the maximum likelihood extraction method. This assessed the fit of the model and its internal consistency, with values above 0.79. In conclusion, the validity and reliability of this psychometric scale for the purposes of evaluating the quality of golf courses perceived by their users have been verified. The results confirm that the scale is a useful tool for golf course research and management.


Asunto(s)
Golf , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Australia , Análisis Factorial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Psicometría , Reproducibilidad de los Resultados , Encuestas y Cuestionarios , Adulto Joven
5.
Artículo en Inglés | MEDLINE | ID: mdl-34886381

RESUMEN

The development of psychomotor skills in childhood enables children to organise the outside world through their bodies, contributing to their intellectual, affective, and social development. The present study aimed to longitudinally evaluate the psychomotor profile, throughout three academic years, of 3, 4 and 5-year-olds belonging to the second cycle of infant school, relating it descriptively to academic performance. The sample consisted of 82 subjects aged between 3 and 6 years throughout the study. The distribution of the sample was homogeneous, with 47.6% boys (n = 39) and 52.4% girls (n = 43). The results not only highlight the importance of the development and stimulation of motor skills from an early age for the overall development of the child, but also, when related to previous studies, show how they influence the development of human beings in adulthood.


Asunto(s)
Rendimiento Académico , Desarrollo Infantil , Adulto , Niño , Preescolar , Femenino , Humanos , Lactante , Aprendizaje , Masculino , Destreza Motora , Desempeño Psicomotor , Instituciones Académicas
6.
Artículo en Inglés | MEDLINE | ID: mdl-34299863

RESUMEN

The objective of this research is to identify the level of general fatigue (FG), physical fatigue (FF) and concentration/motivation (C/M) in sports coaches. Two components of grit, consistency of interest (CI) and perseverance in effort (PE), are also assessed. The possible effects of sex, age, marital status, employment contract, work dedication and grit on FG, FF and C/M in sports coaches are examined. This cross-sectional study analyses 335 sports club coaches (21.2% women, 78.8% male) with a mean age of 29.88 (SD = 9.97) years, at a significance level of p < 0.05 for all analyses. Different aspects of fatigue were determined using the Spanish translation of the Multidimensional Fatigue Inventory-20 (IMF-20). The Grit-S scale was used to measure the ability to persevere, have passion and commit. The results indicated that men scored higher in FF, C/M and PE, while women obtained higher values in FG and CI. Non-contract coaches had higher FG, CI and PE, while coaches with contracts scored higher on C/M and FF. In conclusion, coaches with higher CI had higher FG, and high levels of PE were associated with low FG levels.


Asunto(s)
Objetivos , Motivación , Adulto , Estudios Transversales , Empleo , Fatiga , Femenino , Humanos , Masculino
7.
Front Sports Act Living ; 3: 625944, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33681760

RESUMEN

The objective of the research was to evaluate the perceptions about the psychological variables of cohesion and motivational climate that AGG gymnasts have about the context created by the coaches in their teams and to analyze in the different categories the optimism and competitive anxiety they face in competitive situations. In an attempt to clarify the psychosocial training patterns in this sport and the influence they have on the well-being of its practitioners, competitive anxiety, motivational climate, team cohesion and level of optimism were taken as dependent variables. The sample was made up of 98 national and international junior and senior athletes in the aesthetic gymnastics group aged 13 to 27 (M = 17.1; SD = 2.8). The Perceived Motivational Climate in Sport Questionnaire for motivational climate, the Sport Anxiety Scale-2 for competitive anxiety, the Group Environment Questionnaire for cohesion and the Revised Life Orientation Test for optimism were used in the evaluation. The results obtained show a positive and statistically significant correlation between anxiety and ego involvement, while, for task involvement, high levels of cohesion are associated with high levels of optimism (p = 0.005). In conclusion, the data confirm that high levels of cohesion are associated with high levels of optimism, in addition high scores on task involvement show high scores on cohesion and optimism, however high scores on ego involvement are associated with low scores on cohesion and optimism.

9.
Medicina (Kaunas) ; 56(12)2020 Nov 25.
Artículo en Inglés | MEDLINE | ID: mdl-33255663

RESUMEN

Background and objectives: 339 million people in the world suffer from asthma. Regular physical activity (PA) could help in its control. Therefore, the aim of this research was to determine the level of PA in Spanish people with asthma considering variation by, age, sex, education, marital status, living together, smoking habits, alcohol intake and body mass index (BMI). Materials and Methods: 1014 Spanish people from 15 to 69 years were included in the study. Data of the Spanish Health Survey (year 2017) were analysed. PA levels were measure with the international physical activity questionnaire short version (IPAQ-SF). PA was categorized as low, moderate and high, and analyzed by sample characteristics. Mann-Whitney U test, Kruskall Wallis H and crosstabs were used to calculate statistical significance (p < 0.05). Results: On average, Spanish asthmatics engaged in a weekly volume of 2228.9 metabolic equivalent of task (MET)·min/week. Males revealed significantly higher PA than females (2516.8 vs. 2019.5 MET·min/week; p = 0.005), younger participants (<30 years) compared to people aged 30-60 years and older than 60 years (2699.0; 2243.2; 1619.3 MET·min/week; p < 0.001) and those with tertiary level of education than those without secondary (2368.3 vs. 2168.3 MET·min/week; p = 0.001). Level of PA was lower in those married (p = 0.001) and/or living together (p = 0.010). Alcohol consumers showed a higher level than the participants who did not drink (2378.3 vs. 1907.9 MET·min/week; p = 0.001), but no significant differences were found within current, past and never smokers (p = 0.890). Obese asthmatics engaged in less PA than their normal weight and overweight peers (p < 0.001). Overall, moderate level was significantly the most frequent (47.7%), but 31.6% showed a low level. Conclusions: Three out of ten Spanish people with asthma do not achieve PA recommendations, so PA programs should be executed to make people aware of its benefits in asthma control, focusing on those groups with lower PA levels.


Asunto(s)
Asma , Ejercicio Físico , Adulto , Asma/epidemiología , Índice de Masa Corporal , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Obesidad , Encuestas y Cuestionarios
10.
Salud trab. (Maracay) ; 28(1): 61-71, jun. 2020. ilus
Artículo en Español | LIVECS, LILACS | ID: biblio-1104339

RESUMEN

Los paradigmas en seguridad y salud en el trabajo (SST) nacieron bajo la influencia de las compañías aseguradoras que alimentaron con su data a Heinrich (1931) quien publicó una obra que durante décadas ha sido la guía del personal de seguridad e higiene ocupacional (SHO), en que hace ver que los daños a la salud y la vida de los trabajadores son responsabilidad de los afectados y no de las condiciones y ambiente de trabajo, de la organización del trabajo, ni mucho menos del objetivo de la reproducción del capital, que ha llevado a que se desarrollan acciones de previsión del efecto, como la dotación de implementos de protección personal y colectiva, así como programas basados en el comportamiento del personal y no la prevención del peligro originado en los materiales, en la máquina, la herramienta, el procedimiento, por lo cual continúan sucediéndose incidentes fatales y graves. Para superar esos paradigmas, luego de analizar como impactan, se plantean algunas propuestas como: desarrollo de la perspectiva holística, uso adecuado del léxico en SHO, incorporación de la práctica de la confiabilidad de equipos y procesos al trabajo y el desarrollo de un modelo de gestión que tome en cuenta: al proceso social de trabajo, al objeto a transformar en un bien o un servicio, el estado de los activos y la caracterización tanto del objeto como de los activos, en una dinámica integradora, impulsada por un proceso de mejora continua(AU)


Paradigms in occupational safety and health (OSH) were born under the influence of the insurance companies that provided Heinrich (1931) with his data, who published a work that for decades has been the guide of OSH professionals. His findings, suggested that damages to the health and life of the workers are the responsibility of those affected and not the conditions and work environment, the organization of work, or much less the objective of the growth of capital. This approach led to the development of actions to mitigate or limit the effects of a hazard, such as the provision of personal and collective protective equipment, as well as employee-based behavioral programs and not the primary prevention of hazards related to the materials, machinery, tools, or tasks; hence fatal, serious incidents continue to occur. To overcome these paradigms, after analyzing their impact, we propose other approaches. Among these, the development of a more holistic perspective, adequate use of the OSH lexicon in OSH, incorporation of equipment reliability of equipment, work processes and management models that consider the social work process, the object to be transformed into a good or a service, the state of the assets and the characterization of both the object and the assets, in an integrative dynamic, driven by a process of continuous improvement(AU)


Asunto(s)
Programa de Salud Laboral , Riesgos Laborales , Salud Laboral/tendencias
11.
Artículo en Inglés | MEDLINE | ID: mdl-31963364

RESUMEN

There is a high prevalence of comorbidities among patients with chronic obstructive pulmonary disease (COPD). Comorbidities are likely common in patients with any COPD degree and are associated with increased mortality. The aim of this study was to determine the prevalence of thirty-one different COPD comorbidities and to evaluate the association between physical activity (PA) levels in people with COPD residing in Spain. Cross-sectional data from the Spanish National Health Survey 2017 were analysed. A total of 601 adults (52.2% females) with COPD aged 15 to 69 participated in this study. PA (exposure) was measured with the International Physical Activity Questionnaire (IPAQ) short form and comorbidities (outcomes) were self-reported in response to the question "Have you ever been diagnosed with…?" Multivariable logistic regression, in three different models, was used to assess this association. Results showed a high prevalence of comorbidities (94%), these being chronic lumbar back pain (38.9%), chronic allergy (34.8%), arthrosis (34.1%), chronic cervical back pain (33.3%), asthma (32.9%) and hypertension (32.8%) the most prevalent. Low PA level was significantly associated with urinary incontinence (2.115[1.213-3.689]), chronic constipation (1.970[1.119-3.459]), cataracts (1.840[1.074-3.153]), chronic anxiety (1.508[1.002-2.269]) and chronic lumbar back pain (1.489[1.044-2.125]). Therefore, people with COPD should increase their PA levels in order to reduce their risk of comorbidities and increase their quality of life.


Asunto(s)
Ejercicio Físico , Enfermedad Pulmonar Obstructiva Crónica/complicaciones , Enfermedad Pulmonar Obstructiva Crónica/epidemiología , Adolescente , Adulto , Anciano , Comorbilidad , Estudios Transversales , Femenino , Encuestas Epidemiológicas , Humanos , Masculino , Persona de Mediana Edad , Prevalencia , Calidad de Vida , España/epidemiología , Adulto Joven
12.
Lung ; 197(6): 769-775, 2019 12.
Artículo en Inglés | MEDLINE | ID: mdl-31686208

RESUMEN

PURPOSE: Chronic obstructive pulmonary disease (COPD) represents a major public health problem due to its high prevalence, morbidity and health cost. It has been demonstrated that physical activity (PA) is one of the most beneficial measures to prevent chronic diseases. The aim of this study was to examine PA levels of adults with COPD residing in Spain, and to analyse the differences by sex, age, education, marital status, cohabiting, tobacco consumption, alcohol consumption and body mass index. METHODS: A total of 615 adults aged 15 to 69 years participated in this study. Data from the Spanish National Health Survey 2017 were used. This survey included the short version of IPAQ to measure PA levels. PA was expressed in total volume (MET·min/week), classified as low, moderate and high, and analysed according to sample characteristics. Statistical significance was set at p < 0.05 (CI = 95%). RESULTS: Level of PA was higher in men than in women (1808.8 vs. 1575.6 MET·min/week; p = 0.016), in those aged under 30 years than in those older than 60 years (2129.4 vs. 1381.4 MET·min/week; p = 0.047) and in those who drank alcohol than in those who did not drink (1912.8 vs. 1248.2 MET·min/week; p = 0.004). Also, underweight and obese participants participated in lower levels of PA than normal weight participants (p= 0.001). When classifying PA level, a total of 37.9% had a low level, 47.5% had a moderate level and only 14.6% had a high level of PA (p < 0.001). CONCLUSION: It is recommendable to implement programs to raise awareness of the importance and benefits of PA in the control of COPD, and these programs should focus on those with lower levels of PA.


Asunto(s)
Consumo de Bebidas Alcohólicas/epidemiología , Ejercicio Físico , Obesidad/epidemiología , Enfermedad Pulmonar Obstructiva Crónica/epidemiología , Fumar/epidemiología , Adolescente , Adulto , Factores de Edad , Anciano , Índice de Masa Corporal , Estudios Transversales , Escolaridad , Femenino , Humanos , Masculino , Estado Civil , Equivalente Metabólico , Persona de Mediana Edad , Factores Sexuales , España/epidemiología , Encuestas y Cuestionarios , Adulto Joven
13.
J Hum Kinet ; 69: 259-269, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31666908

RESUMEN

There has recently been an increase in quantification and objective analysis of soccer performance due to improvements in technology using load indexes such as Player Load (PL) and Metabolic Power (MP). The objectives of this study were: (1) to describe the performance of PL and MP in competition according to the specific role, match-to- match variation, periods of play, game location and match status according to game periods, and (2) to analyze the relationship between both indexes. Twenty-one national-level soccer players were distributed in the following specific positional roles: external defenders (ED) (n = 4), central defenders (CD) (n = 4), midfielders (M) (n = 5), external midfielders (EM) (n = 4) and attackers (A) (n = 4). A total of 12 matches played by a Spanish Third Division team during the 2016/2017 season were analyzed. WIMU PROTM inertial devices (RealTrack System, Almeria, Spain) were used for recording the data. The main results were: (1) a performance reduction in both variables over the course of match time, (2) significant differences in both variables based on the specific position, (3) differences in physical demands during the season matches, (4) winning during a game period and the condition of being the visitor team provoked higher demands, and (5) a high correlation between both variables in soccer. In conclusion, different contextual variables influence the external load demands; both indexes are related so they could be used for external load quantification, and it is necessary to analyze physical demands of the competition for a specific and individualized load design in training sessions.

14.
Front Psychol ; 10: 1998, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31632310

RESUMEN

The purpose of this study was to see the effects of an appropriate behavior development program in relation to the improvement of fair play and social skills behaviors of elementary school children during the physical education class. The participants of this study were 204 students from 5th and 6th grade from seven different public schools in Castilla-La Mancha, Spain. Data was collected through a questionnaire to measure students' pre and post appropriate behaviors when winning, appropriate behaviors when loosing, appropriate behaviors during the game, fair play skills and social skills, during the physical education class. Results from this study revealed that participants improved their behaviors with the implementation of the intervention (appropriate behavior program), generating positive changes in students' attitudes and social skills during physical education class. In relation to children gender, girls had better scores than boys in relation to appropriate behaviors when losing. Further, when comparing students' age, those from 10 to 11 years old scored higher in fair play behaviors and social skills. In conclusion, the intervention program was effective to improve the behaviors of the school children, generating positive changes in their attitudes and social skills during physical education.

15.
Front Physiol ; 10: 130, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30837896

RESUMEN

The objective was to analyze body composition in children and adolescents of Southern Europe to identify prevalence of overweight and obesity. This investigation involved 512 girls and 488 boys between 7-to 19-years. Variables evaluated were Body Mass Index (BMI) and Fat Mass (FM; electrical bioimpedance). The references used to establish prevalence according to BMI were those of the World Health Organization (WHO) and the International Obesity Task Force (IOTF); in the case of FM, the Child Growth Foundation (CGF) reference was used. There were significant differences (p < 0.05) in the prevalence of overweight and obesity between the three classifications (32.3% according to IOTF, 37.3% according to WHO, and 39.8% according to CGF), being higher in males. WHO-IOTF concordance was substantial (kappa = 0.793), whereas concordances WHO-CGF (kappa = 0.504) and IOTF-CGF (kappa = 0.447) were moderate. The authors recommend evaluating overweight and obesity not only with BMI, but also with FM, and always specify the references used.

16.
Medicina (Kaunas) ; 54(5)2018 Nov 12.
Artículo en Inglés | MEDLINE | ID: mdl-30424496

RESUMEN

BACKGROUND AND OBJECTIVE: Population levels of physical activity are an international concern. The purpose of the present study was to describe and analyse physical activity levels in Lithuanian adolescents. MATERIALS AND METHODS: With this aim in mind, the Physician-based Assessment and Counselling for Exercise (PACE) questionnaire was administered to 5141 adolescents residing in Lithuania, 2502 boys (48.7%) and 2639 girls (51.3%), aged between 11 and 19 years. RESULTS: It was found that adolescents studied met the physical activity guideline, of 60 min of moderate-to-vigorous physical activity a day, on average 3.6 days/week (SD = 2.1). A total of 3426 adolescents (66.6%) were inactive as classified by the PACE questionnaire (at least 1 h of physical activity/day < 5 days/week). In the present sample there were more active (at least 1 h of physical activity/day ≥ 5 days/week) boys (n = 994, 39.7%) than girls (n = 721, 27.3%) (p < 0.001; OR 1.75, 95% CI 1.56 to 1.97), and, on average, boys were more likely to meet daily recommendations of physical activity than girls, 0.7 days more a week (p < 0.001; IRRs 1.21, 95% CI 1.17 to 1.25). According to age, younger adolescents (11⁻12 years) were significantly more active than older adolescents (13⁻19 years) and a curvilinear relationship between age and physical activity was observed with significant linear (unstandardized beta (B) = -0.807; standardized beta (ß) = -0.796; p < 0.001) and quadratic terms (unstandardized beta (B) = 0.024; standardized beta (ß) = 0.704; p < 0.001). CONCLUSIONS: It is necessary to increase the level of physical activity in Lithuanian adolescents and intervention programs should be carried out considering these results.


Asunto(s)
Desarrollo del Adolescente , Ejercicio Físico , Deportes Juveniles/estadística & datos numéricos , Adolescente , Adulto , Factores de Edad , Niño , Femenino , Estilo de Vida Saludable , Humanos , Lituania , Masculino , Distribución de Poisson , Análisis de Regresión , Factores Sexuales , Encuestas y Cuestionarios , Adulto Joven
17.
J Hum Kinet ; 61: 63-72, 2018 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-29599860

RESUMEN

There is no clear evidence that vitamin D effectively improves physical capacity in high-level athletes. The aim of this study was to confirm that vitamin D supplementation of soccer players during eight-week high-intensity training would have a significant effect on their aerobic capacity. The subjects were divided into two groups: the experimental one that was supplemented with vitamin D (SG, n = 20), and the placebo group (PG, n = 16), not supplemented with vitamin D. All the players were subjected to the same soccer training described as High-Intensity Interval Training (HIIT). The data of the vitamin D level, PWC170, lactate threshold (LT) were collected just before and after the intervention. A significant increase in vitamin D concentration (119%) was observed in the supplemented group, while the non-supplemented group showed a decrease of 8.4%. The studied subjects improved VO2max results by 20% in the SG, and by 13% in the PG. The improvement in velocity at the LT was similar in both groups. Results of this study show that vitamin D can have a positive, though moderate, effect on aerobic performance in players subjected to high-intensity training in the form of small-sided games for 8 weeks.

19.
Opt Lett ; 42(7): 1393-1396, 2017 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-28362777

RESUMEN

Optical tweezers consist of the spatial confinement of microscopic dielectric particles by the action of forces produced by the change in momentum of the photons of a highly focused laser beam that are deviated by the particle. In experiments that use a single laser beam, it is common to capture not only one but a few particles in the optical trap. However, to our knowledge, the formation of a long chain of beads optically confined with a single laser beam has never been reported. In this work, up to 73 silica spheres immersed in water are seen concatenated along the propagation direction of a 976-nm wavelength Gaussian laser of 300 mW of power. This long chain of beads is obtained when the laser is focused through an oil-immersion DIN microscope objective with 100× magnification and a numerical aperture of 1.25. When performing the same experiment using an infinity-corrected UplanFLN 100× objective with a numerical aperture of 1.3, the maximum number of concatenated beads is only 14. Our results suggest that the mechanisms responsible for the observed phenomena involve successive refocusing of the laser beam by each trapped sphere, optically induced dipole coupling (commonly referred to as optical binding), and aberrations generated by the DIN microscope objective.

20.
J Nutr Sci Vitaminol (Tokyo) ; 63(6): 357-364, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-29332896

RESUMEN

Vitamin D deficiency has been associated with increased risk for cardiovascular disease and anemia. Vitamin D-related changes in lipid profile have been studied extensively but the relationship between vitamin D and lipid metabolism is not completely understood. As both vitamin D and intermittent training may potentially affect iron and lipid metabolism, the aim of the study was to evaluate whether a daily supplementation of vitamin D can modulate the response of hematological and lipid parameters to high-intensity interval training (HIIT) in soccer players. Thirty-six young elite junior soccer players were included in the placebo-controlled, double-blind study. Participants were non-randomly allocated into either a supplemented group (SG, n=20, HIIT and 5,000 IU of vitamin D daily) or placebo group (PG, n=16, HIIT and sunflower oil). Hematological parameters were ascertained before and after the 8-wk training. The change score (post- and pre-training difference) was calculated for each individual and the mean change score (MCS) was compared between SG and PG using the t test and analysis of covariance. There were no differences between SG and PG at baseline. The red and white cell count, hemoglobin, hematocrit, MCHC, ferritin, and HDL-cholesterol changed significantly over the 8-wk HIIT. However, no significant differences in MCS were observed between SG and PG for any variable. A daily vitamin D supplement did not have any impact on alteration in hematological or lipid parameters in young soccer players in the course of high-intensity interval training.


Asunto(s)
Suplementos Dietéticos , Entrenamiento de Intervalos de Alta Intensidad , Hierro/metabolismo , Lípidos/sangre , Fútbol , Vitamina D/administración & dosificación , Adolescente , Atletas , HDL-Colesterol/sangre , Método Doble Ciego , Recuento de Eritrocitos , Índices de Eritrocitos , Hematócrito , Pruebas Hematológicas , Hemoglobinas/análisis , Humanos , Recuento de Leucocitos , Placebos
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