Oxygen Uptake Slow Component and the Efficiency of Resistance Exercises
| Autor: | José Luis Maté-Muñoz, Raúl Domínguez, Lluis Guirao Cano, Manuel Vicente Garnacho-Castaño, Manuel Gomis Bataller, Eulogio Pleguezuelos Cobo, Noemi Serra-Paya, Jesús Guodemar-Pérez, Teresa Carbonell, Lluis Albesa-Albiol |
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| Rok vydání: | 2021 |
| Předmět: |
Male
Chemistry Lactate threshold Repetition maximum Resistance Training Physical Therapy Sports Therapy and Rehabilitation Squat Cardiorespiratory fitness 030229 sport sciences General Medicine 030204 cardiovascular system & hematology Slow component Oxygen uptake Intensity (physics) Oxygen 03 medical and health sciences 0302 clinical medicine Animal science Exercise Test Humans Orthopedics and Sports Medicine Lactic Acid Power output Exercise |
| Zdroj: | Journal of Strength and Conditioning Research. 35:1014-1022 |
| ISSN: | 1064-8011 1014-1022 |
| Popis: | Garnacho-Castaño, MV, Albesa-Albiol, L, Serra-Payá, N, Gomis Bataller, M, Pleguezuelos Cobo, E, Guirao Cano, L, Guodemar-Pérez, J, Carbonell, T, Domínguez, R, and Maté-Muñoz, JL. Oxygen uptake slow component and the efficiency of resistance exercises. J Strength Cond Res 35(4): 1014-1022, 2021-This study aimed to evaluate oxygen uptake slow component (V̇o2sc) and mechanical economy/efficiency in half squat (HS) exercise during constant-load tests conducted at lactate threshold (LT) intensity. Nineteen healthy young men completed 3 HS exercise tests separated by 48-hour rest periods: 1 repetition maximum (1RM), incremental-load HS test to establish the %1RM corresponding to the LT, and constant-load HS test at the LT. During the last test, cardiorespiratory, lactate, and mechanical responses were monitored. Fatigue in the lower limbs was assessed before and after the constant-load test using a countermovement jump test. A slight and sustained increase of the V̇o2sc and energy expended (EE) was observed (p0.001). In blood lactate, no differences were observed between set 3 to set 21 (p0.05). A slight and sustained decrease of half squat efficiency and gross mechanical efficiency (GME) was detected (p0.001). Significant inverse correlations were observed between V̇o2 and GME (r = -0.93, p0.001). Inverse correlations were detected between EE and GME (r = -0.94, p0.001). Significant losses were observed in jump height ability and in mean power output (p0.001) in response to the constant-load HS test. In conclusion, V̇o2sc and EE tended to rise slowly during constant-load HS exercise testing. This slight increase was associated with lowered efficiency throughout constant-load test and a decrease in jump capacity after testing. These findings would allow to elucidate the underlying fatigue mechanisms produced by resistance exercises in a constant-load test at LT intensity. |
| Databáze: | OpenAIRE |
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