The relationship between orthorexia nervosa and body composition in female students of the nutrition and dietetics department.

This study was carried out to determine the relationship between orthorexia nervosa (ON) and eating disorder and body composition, class level, and place of residence in university students from the Department of Nutrition and Dietetics. The participants (n = 136; 20.9 ± 2.0 years) were all female students, whose scores on the Orthorexia Nervosa Questionnaire (ORTO-11) and the Eating Attitudes Test (EAT-40) indicated a prevalence of ON and eating disorder. Assessment of body composition indices (Tanita bioelectrical impedance; SC-330) of the participants showed there to be no significant difference in the EAT-40 and ORTO-11 scores in terms of body composition, class level, and place of residence. A large majority of the participants (70.6%) had high ORTO-11 scores, and a significant negative correlation (p < 0.05) was identified between the EAT-40 and ORTO-11 scores. Final results from analysis of the data showed that although abnormal orthorexic tendencies were common among the students from the Department of Nutrition and Dietetics, they were nonetheless able to maintain body composition within normal values. LEVEL OF EVIDENCE: V, cross-sectional descriptive study.

The influence of physical training modalities on basal metabolic rate and leptin on obese adolescent boys.

The aim of this study was to investigate the effects of physical training modalities on basal metabolic rate, cardiovascular fitness and serum leptin level in obese adolescent boys. Sixteen obese adolescent boys (age: 16.81 +- 0.91 years) were randomly assigned to either resistance (RTG) (n=8) or endurance (ETG) (n=8) training and followed the respective training programmes for six months (3 days/wk, 60 min/day). Leptin, basal metabolism rate (BMR), and maximum oxygen consumption (VO2max) were evaluated at the beginning and end of the intervention. After the training period, Leptin was decreased and VO2max was increased in both groups (p<0.05), whereas BMR was statistically increased only in ETG (p<0.05). These results indicated that both types of exercises had positive effects on cardiovascular fitness and hormonal control of fat metabolism in obese male adolescents. Resistance exercises should be considered as an alternative or supplementation to endurance exercises in youth obesity management.

Hamstring Flexibility Is Not Correlated with Isokinetic Knee Muscle Strength in Female Modern Dancers.

OBJECTIVE: To evaluate bilateral isokinetic knee extensor and flexor muscle strength relative to hamstring flexibility in female modern dancers. METHODS: 20 trained university-level female modern dance students (mean age 23.8±3.8 yrs) volunteered for the study. Concentric isokinetic peak torque (PT, in Nm), peak torque % of body weight (PT%BW, in Nm/kg), and total work (TW, in J) of the knee extensor and flexor muscles for each leg were measured with a dynamometer at a velocity of 60, 180, and 300°/s. Hamstring flexibility of both limbs was assessed by a goniometer with the subjects in a supine position using the active straight leg raise (SLR) test. Participants were divided into flexible (n=10) and highly flexible (n=10) groups based on their hamstring flexibility. RESULTS: The flexible and highly flexible groups had significant differences (p≤0.05) for the right (flexible, 119.7±4.3°; highly flexible, 137.7±2.6°) and left active SLR tests (flexible, 120.6±5.3°; highly flexible, 138.3±4.5°). No significant differences were found between the flexible and highly flexible dancers for concentric knee extensor and flexor muscle strength in all selected parameters (p≤0.05). There were also no significant correlations between flexibility and bilateral PT, PT%BW, and TW scores (60, 180, and 300°/s) of dancers at the concentric contraction (p≤0.05). CONCLUSION: These findings indicate that hamstring flexibility (for both the flexible and highly flexible groups) is not correlated with knee strength and has no impact on torque and work production during maximal concentric isokinetic knee muscle action in university-level female modern dancers.

Balance Training in Modern Dancers: Proprioceptive-Neuromuscular Training vs Kinesio Taping.

Kinesio tape and proprioceptive exercises are both used for increasing balance in dancers. The purposes of this study were to: a) determine the acute effect of kinesio tape (KT) application on the ankle joint on balance performance, b) investigate the effects of an 8-week proprioceptive-neuromuscular (PN) training program on balance performance, and c) compare their effects vs modern dance technique classes alone. Thirty-three trained, university-level modern dance students (9 male, 24 female) were divided randomly into three groups: kinesio tape (KT, n=11), proprioceptive-neuromuscular (PN, n=11), or control (n=11). Static (turn-out passé-opened eyes/relevé and turn-out passé-closed eyes/flat foot), semi-dynamic (airplane), and dynamic balance (monopodalic-straight and -transverse in a turn-out passé-eyes opened/flat foot) tests were performed before and after the intervention. One day after pre-tests, KT mechanical correction technique was applied to the left ankle joint (supporting leg) in the KT group, and tests were repeated to determine the acute effect of KT. The PN group participated in an 8-week balance training program (2 days/wk, 60 min/day) involving exercises using stable and unstable surfaces. Significant improvements were observed for all static and dynamic balance tests in the PN group; semi-dynamic airplane and dynamic monopodalic-straight and transverse tests improved in the KT group; and only semi-dynamic airplane test scores changed significantly for the control group (p<0.05). Our findings suggest that with the exception of the semi-dynamic airplane test, both PN training and KT application were more effective at improving balance performance for modern dancers than modern dance technique classes alone.

Effects of an Eight-Week Proprioceptive Neuromuscular Facilitation Stretching Program on Kicking Speed and Range of Motion in Young Male Soccer Players.

The aim of this study was to determine the effect of the 8-week proprioceptive neuromuscular facilitation (PNF) exercises that were carried out on lower extremity on kicking speed and range of motion (ROM) performance in young soccer players. Twenty-four soccer players (15.6 ± 0.4 years) were selected from nonprofessional young soccer team. All players' height, weight, ROM (ankle plantar and dorsal flexions, hip flexions and extensions), and kicking speed tests were evaluated before and after 8 weeks. The participants were divided into PNF (n = 11) and control (n = 11) groups. Both groups continued technical and tactical soccer training together 3 days (120 min·d) a week. The PNF group attended additionally unassisted PNF-contract-relax (CR) stretching through 8 weeks, 2 days per week, 20 minutes' session duration. The control group did not participate in any additional PNF stretching sessions. There were significant differences in kicking speed, right ankle active dorsal flexion, and hip active flexion (right and left) (p ≤ 0.05) of the PNF group, whereas there were no significant differences between groups in left ankle active dorsal flexion, hip active extension (right and left), and ankle active plantar flexion (right and left) (p > 0.05). We conclude that an 8-week unassisted PNF-CR improved on the ROM of particular lower extremity joints and the kicking speed in the young male soccer players. These results provide strength and conditioning coaches with a practical way to use unassisted PNF-CR in warm-up for positive improvements in the ROM of the hip and ankle and the applications of the kicking speed.

The effect of 8-week plyometric training on leg power, jump and sprint performance in female soccer players.

The aim of this study was to determine the effect of 8-week plyometric training (PT) on the leg power and jump and sprint performance in female soccer players. Eighteen female soccer players from Women Second League (age = 18.2 ± 2.3 years, height = 161.3 ± 5.4 cm, body mass = 56.6 ± 7.2 kg) were randomly assigned to control (n = 9) and plyometric (n = 9) groups. Both groups continued together with regular technical and tactical soccer training for 4 days a week. Additionally, the plyometric group underwent PT for 8 weeks, 1 day per week, 60-minute session duration. During the 8-week period, the control group was hindered from any additional conditioning training. All players' jumps (triple hop, countermovement jump, and standing broad jump), running speed (20 m), and peak power were evaluated before and after 8 weeks. No significant difference was found between the groups at pretest variables (p > 0.05). Significant improvements were found in the posttest of both the groups (p ≤ 0.05), except for 20-m sprint test in the control group (p > 0.05). Triple hop distance, countermovement jump, standing broad jump, peak power, and 20-m sprint test values were all significantly improved in the plyometric group, compared with the control group (p ≤ 0.05). We concluded that short duration PT is an improved important component of athletic performance in female soccer players. The results indicate that safe, effective, and alternative PT can be useful to strength and conditioning coaches, especially during competition season where less time is available for training.

Isokinetic strength profiles of thigh muscles of modern dancers in relation to their experience level.

UNLABELLED: The aim of this study was to determine maximal voluntary peak torque (PT), PT% body weight (PT%BW), total work (TW), and hamstring/quadriceps ratio (HQR) for bilateral and unilateral thigh muscle strength during isokinetic muscle contractions in modern dancers in relation to their experience level. METHODS: Twenty-two female dancers were divided into two groups: intermediate dancers (ID, n=11) and advanced dancers (AD, n=11). Strength tests were performed using the Biodex System-III Pro Multijoint System isokinetic dynamometer to determine three joint angular velocities (60, 180, 300°/s). RESULTS: During extension, ADs exhibited higher ratios in the HQR (p=0.016) on right leg at 300°/s, IDs generated greater TW (p=0.042), and within groups, there was a significant left-to-right difference in the HQR at 300°/s for ADs (p=0.042). During flexion, within groups, the ADs exhibited significant differences between legs for both PT (p=0.026) and PT%BW (p=0.022) at 300°/s. CONCLUSION: For both groups, the average HQR in all angular velocities was not within the recommended range, which is required to prevent injuries; at the same time, unilateral muscular imbalances existed. Lower extremities of ADs exhibited asymmetric strength patterns at a certain level. Further research should be done to confirm the findings of this pilot study.

Comparison of kinanthropometric profiles of elite Turkish taekwondo players with or without medals in European championships / Comparación de perfiles cineantropométricos de peleadores turcos de élite de taekwondo con o sin medallas en campeonatos europeos

SUMMARY: This study aims to determine the possible differences anthropometric characteristics and body composition profiles of elite taekwondo players with or without medals in European championships. Twenty-one black-belt elite taekwondo athletes (17.4±1.2 years) from the Turkish national team were divided into two groups, namely, medalists (MEC; n =11) and non-medalists (NmEC; n=10) in European championships. Twenty-eight anthropometric measurements including height, body mass, length, circumferences, breadth, and skinfolds were taken following the standard techniques proposed by the International Society for the Advancement of Kinanthropometry (ISAK). Body composition variables were evaluated by using skinfold thickness measurements. Results demonstrated that anthropometric and body composition, variables did not differ significantly between medalist and non-medalist taekwondo players (p>0.01). Our athletes have a low percentage of body fat and high muscle mass profile. Medalist and non-medalist elite Turkish taekwondo players in the European championships do not differ in terms of anthropometric and body composition components. They have a similar body composition profile suitable for taekwondo players and within acceptable healthy ranges. The present study assists coaches in the formulation of appropriate training programs aiming the development for managing the body composition status of players, which will be associated with high-level performance in taekwondo. Future studies should include body composition and somatotype profile inspection throughout the weight categories.

RESUMEN: Este estudio tuvo como objetivo determinar las posibles diferencias antropométricas y perfiles de composición corporal de los peleadores de taekwondo de élite, con o sin medallas en campeonatos europeos. Veintiún atletas de taekwondo de élite de cinturón negro (17,4 ± 1,2 años) del equipo nacional turco se dividieron en dos grupos, medallistas (MEC; n = 11) y no medallistas (NmEC; n = 10). Se tomaron veintiocho medidas antropométricas incluyendo altura, masa corporal, longitud, circunferencias, ancho y pliegues cutáneos siguiendo las técnicas estándar sugeridas por la Sociedad Internacional para el Avance de la Cineantropometría (ISAK). Las variables de composición corporal se evaluaron mediante mediciones del grosor de los pliegues cutáneos. Los resultados demostraron que las variables antropométricas y de composición corporal no difirieron significativamente entre los jugadores de taekwondo medallistas y no medallistas (p> 0,01). Nuestros deportistas tienen un bajo porcentaje de grasa corporal y un alto perfil de masa muscular. Los medallistas y no medallistas de taekwondo turcos de élite en los campeonatos europeos no difieren en términos de components antropométricos y de composición corporal. Tienen un perfil de composición corporal similar adecuado para peleadores de taekwondo y dentro de rangos saludables aceptables. El presente estudio ayuda a los entrenadores en la formulación de programas de entrenamiento apropiados que apunten al desarrollo para manejar el estado de la composición corporal de los peleadores, lo que se asociará con un rendimiento de alto nivel en taekwondo. Los estudios futuros deben incluir la inspección de la composición corporal y el perfil del somatotipo en todas las categorías de peso.

PULMONARY AND BIOCHEMICAL CHARACTERISTICS OF SMOKER AND NON-SMOKER MODERN DANCERS / CARACTERISTICAS PULMONARES E BIOQUÍMICAS DE DANÇARINOS MODERNOS FUMANTES E NÃO-FUMANTES / CARACTERÍSTICAS PULMOMARES Y BIOQUÍMICAS DE BAILARINAS MODERNAS FUMADORAS Y NO FUMADORAS

ABSTRACT Introduction: Although the harmful effects of smoking on the cardiovascular and respiratory systems have been established for a long time, the effect on physiological and physical parameters in modern female dancers is not well documented. Objective: To determine differences in selected pulmonary functions, biochemical parameters, and body composition in female smoker and non-smoker modern dancers who are university or graduate students. Methods: A total of twenty-two female modern dancers (mean age of 24.6 ± 4.3 years), who were non-smokers (n = 11) and smokers (n = 11), voluntarily participated in the study. The smokers had been smoking 1 to 20 cigarettes per day for an average period of seven years. The pulmonary function test Mir Spirobank Spirometer, (Italy) was applied; selected biochemical parameters were tested, and various anthropometric measurements (height, weight and seven skinfold thickness) were performed. The results of body composition were evaluated using Jackson-Pollock equations. Intergroup comparisons were performed using the Mann-Whitney U test. Result: No significant differences were found between smoker and non-smoker dancers in terms of body composition (body fat, % body fat, lean body fat) and selected biochemical parameters (p > 0.05). However, non-smokers had prediction values of forced expiratory volume during the first second (FEV1) and peak expiratory flow (PEF) significantly better (p < 0.05). The effect of smoking on the performance of female modern dancers should be examined in a longitudinal study, with a higher number of participants. Conclusion: It was observed that smoking reduces lung pulmonary capacity at a certain rate, although the biochemical parameters and body composition of the female smoker and non-smoker dancers were similar.

RESUMO Introdução: Embora os efeitos nocivos do fumo nos sistemas cardiovascular e respiratório tenham sido estabelecidos há muito, o efeito sobre os parâmetros fisiológicos e físicos em bailarinas de dança moderna não foi bem documentado ainda. Objetivo: Determinar as diferenças em funções pulmonares selecionadas, parâmetros bioquímicos e composição corporal em bailarinas de dança moderna fumadoras e não-fumadoras, universitárias e pós-universitárias. Métodos: Vinte e duas bailarinas de dança moderna (média de idade de 24,6 ± 4,3 anos), não fumantes (n = 11) e fumantes (n = 11), participaram voluntariamente no estudo. As fumantesconsumiram de 1 a 20 cigarros por dia durante uma média de sete anos. Foi aplicado o teste funcional pulmonar Mir Spirobank Spirometer, (Itália), alguns parâmetros biomédicos selecionados foram testados e foram realizadas várias medições antropométricas (altura, peso e sete espessuras de pregas cutâneas). Os resultados da composição corporal foram avaliados usando equações Jackson-Pollock. As comparações intergrupo foram realizadas usando o teste "U" de Mann-Whitney. Resultado: Não foram encontradas diferenças significativas entre as bailarinas fumantes e não fumantes quanto à composição corporal (gordura corporal, % massa gorda, massa corporal magra) e nos parâmetros bioquímicos selecionados (p > 0,05). No entanto, as não fumantes tinham valores de predição do volume expiratório forçado no primeiro segundo (VEF1) e pico de fluxo expiratório (PFE) significativamente melhores (p < 0,05). O efeito do tabagismo no desempenho de bailarinas de dança moderna deveria ser examinado num estudo longitudinal, com um maior número de participantes. Conclusão: Foi observado que o fumo reduz a capacidade pulmonar a uma certa taxa, embora os padrões bioquímicos e a composição corporal das bailarinas fumantes e não fumantes fossem semelhantes.

RESUMEN Introducción: Aunque los efectos nocivos del tabaco en los sistemas cardiovascular y respiratorio hayan sido establecidos hace mucho, el efecto sobre los parámetros fisiológicos y físicos en bailarinas de danza moderna no fue aún bien documentado. Objetivo: Determinar las diferencias en funciones pulmonares seleccionadas, parámetros bioquímicos y composición corporal en bailarinas de danza moderna fumadoras y no fumadoras, universitarias y post universitarias. Método: Veintidós bailarinas de danza moderna (edad promedio de 24,6 ± 4,3 años), no fumadoras (n=11) y fumadoras (n=11), participaron voluntariamente en el estudio. Las fumadoras habían fumado desde 1 hasta 20 cigarrillos por día durante un promedio de siete años. Fue aplicado el test funcional pulmonar espirómetro Mir Spirobank, (Italia), y fueron hechos algunos tests de parámetros biomédicos seleccionados y hechas varias mediciones antropométricas (altura, peso y siete espesores de los pliegues cutáneos). Los resultados de la composición corporal fueron evaluados usando ecuaciones Jackson-Pollock. Las comparaciones intergrupales fueron realizadas usando el test Mann-Whitney U. Resultado: No fueron encontradas diferencias significativas entre bailarinas fumadoras y no fumadoras en la composición corporal (grasa corporal, % de masa grasa, masa corporal magra) y en los parámetros bioquímicos seleccionados (p > 0,05). Sin embargo, las no fumadoras tuvieron valores de predicción del volumen espiratorio forzado en el primer segundo (VEF1) y del flujo espiratorio máximo (FEM) significativamente mejores (p < 0,05). El efecto del tabaco en el desempeño de bailarinas de danza moderna debería ser examinado en un estudio longitudinal, con un aumento del número de participantes. Conclusión: Se observó que el tabaco reduce la capacidad pulmonar a una cierta tasa, aunque los estándares bioquímicos y la composición corporal de las bailarinas fumadoras y no fumadoras fueron similares.