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1. Can professional soccer practice lead to muscle strength imbalances?

Author

José Carlos dos Santos Albarello, Gustavo Henrique Halmenschlager, Eduardo Favreto, Willian Fin, Mateus Ahlert, and Cleiton Chiamonti Bona

Subjects
bilateral asymmetry, h/q ratio, knee extensors, knee flexors, torque, Sports, GV557-1198.995
Abstract

In this study, we compared the knee strength parameters tested in professional football players at the preparatory and competitive seasons, separated by 12 weeks. Knee extensors and flexors peak torque, hamstring to quadriceps conventional ratio (H/Qcon), and bilateral asymmetry index (AI) on the dominant and non-dominant limbs of 10 football players were evaluated in an isokinetic dynamometer. Paired t-test was used to compare all variables between the preparatory and competitive seasons. A one-sample t-test was used to compare the H/Qcon and AI with theoretical means defined as 0.6 and 10%, respectively. The results showed a significant peak torque improvement in the dominant side for both knee extensors (p=0.013) and flexors (p=0.003), whereas on the non-dominant limb there was no significant difference. Regarding the H/Qcon, dominant and non-dominant sides were below 0.6 during the preparatory and competitive seasons (p

Published
2023

2. COMPARACIÓN DEL EPOC Y GASTO ENERGÉTICO DE RECUPERACIÓN ENTRE HIIT Y AERÓBICOS CONTINUOS

Author

Mateus Ahlert, Gustavo Henrique Halmenschlager, Fernando Matzenbacher, and José Carlos dos Santos Albarello

Subjects
030209 endocrinology & metabolism, Physical Therapy, Sports Therapy and Rehabilitation, Oxygen consumption, Gasto de energía, Entrenamiento en intervalos de alta intensidad, 03 medical and health sciences, 0302 clinical medicine, Animal science, Weight loss, Gasto energético, Medicine, Aerobic exercise, Orthopedics and Sports Medicine, Consumo de oxígeno, Treinamento intervalado de alta intensidade, lcsh:Sports medicine, business.industry, High intensity, Significant difference, Exercício aeróbico, VO2 max, Consumo de oxigênio, 030229 sport sciences, Intensity (physics), Sample group, Energy expenditure, High-intensity interval training, Ejercicio aeróbico, medicine.symptom, business, lcsh:RC1200-1245
Abstract

Objectives: The objective of this study was to compare EPOC - excess post-exercise oxygen consumption and recovery energy expenditure between high intensity interval aerobic exercise (HIIT) and continuous aerobic exercise in adult amateur runners. Methods: The study included 10 runners, with a mean age of 35.7 ± 5.87 years, height 1.69 ± 0.11 m; body mass 74.13 ± 11.26 kg; fat percentage 19.31 ± 4.27% and maximal oxygen consumption (VO2max) of 3.50 ± 0.64 l/kg/min-1. The continuous aerobic exercise protocol consisted of 20 minutes of running with intensity of 70-75% HRmax. Two 20-second cycles of 8 sprints were performed for HIIT at the highest possible speed, with 10 seconds of rest and a 3-minute interval between cycles. The sample group performed the two protocols at least 48 hours and at most one week apart. EPOC was observed using ergospirometry after the running protocols, and mean consumption was analyzed between 25-30 minutes after exercise. Oxygen consumption at 9-10 minutes was used for resting consumption. The study has a cross-sectional experimental design. Results: Oxygen consumption of 0.57 ± 0.29l/kg/min1 and energy expenditure of 2.84 ± 1.44 kcal/min were observed for continuous aerobic exercise, with values of 0.61 ± 0.62 l/kg/min−1 and 3.06 ± 1.10 kcal/min respectively (p

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