A força máxima obtida no leg press 45º é preditora de massa livre de gordura em membros inferiores.
INTRODUCTION: Strength is one of the primary motor skills that is strongly related to both health and sports performance. However, several factors may interfere with its expression, such as anatomical and neuromuscular characteristics, and its expression is proportional to the cross-sectional area o...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/48021 |
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| Resumo: | INTRODUCTION: Strength is one of the primary motor skills that is strongly related to both health and sports performance. However, several factors may interfere with its expression, such as anatomical and neuromuscular characteristics, and its expression is proportional to the cross-sectional area of the skeletal muscle. OBJECTIVE: The objective of this study was to determine whether the loads obtained in a maximum repetition (1RM) in leg press 45 ° and extensor chair exercises by untrained individuals would present significant relationships between maximal strength, quadriceps muscle thickness or if they would be useful measures to predict fat free mass. of lower limbs. METHODS: The sample consisted of 35 healthy men, aged 31.37 ± 6.82 years; weight 82.03 ± 13.61kg; Height 175.29 ± 5.52cm and BMI 26.61 ± 3.64, which underwent tests of strength (1RM), body composition by double-scan x-ray (DEXA) and muscle thickness (Ultrasound). RESULTS: The bivariate correlations showed that the maximum force obtained in the extensor chair was positively associated with the rectus femoris muscle thickness (r = -, 35, p <0.036); However, in the 45º leg press exercise, this association did not occur (r = -, 25, p <0.154). Moreover, in both exercises, this association was not found with the other muscles analyzed. The results indicated that the maximum force obtained in the 45º leg press predicts greater fat free mass in the lower limbs [F (6; 1); (t = 1.5; β = 0.527; p = 0.001), but does not predict greater muscle thickness [F (-1, 2); t = -59; p = -0.09; p = 0.429], and the maximum force developed in the extensor chair predicts greater fat-free mass [F (2; 0.8); (t = 2.5; β = 0.401; p = 0.017] but does not predict muscle thickness [F (12.7); t = 1.7; β = 0.273; p = 0.097].CONCLUSION: The 1RM protocol is a tool that can predict the fat free mass of lower limbs, especially when performed at 45º leg press. |
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