Demanda energética na sessão de exercício resistido com características de hipertrofia e resistência muscular localizada

• Autor(a) principal: Campanholi Neto, Jose [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/132554; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/15-12-2015/000855858.pdf
• topic: Physiology; Fisiologia; Musculação; Exercícios físicos; Oxigênio - Transporte fisiológico

One of the strategies used to increase energy expenditure (EE) is the practice of resistance training (RT). Correctly handling the variables volume and intensity allows to optimize EE during RT sessions. The EE in RT is composed of two components: the aerobic, linked to oxygen consumption, and anaerobic, related to lactate accumulation. The purposes of this study were: a) to compare the acute effects of RT (hypertrophy vs. endurance) over total EE during two sessions of equal work; b) investigate and compare the participation of aerobic and anaerobic components during two RT sessions of equal work; c) check in which of the studied intensities lead to the highest concentration of lactate after the sessions; d) analyze the distribution of time (exercises and recovery) in RT sessions; e) examine which of the RT sessions studied causes the highest ratings of perceived exertion. Thirteen healthy adult men (( ̅ ± SE) age 27.08 ± 1.48 years; height 176.8 ± 1.83 cm; body mass 85.38 ± 2.95 kg; body fat 18.38 ± 1.51 %) participated in the study. Subjects performed eight resistance training exercises. To equate workload, the hypertrophy session involved performing 3 sets of 10 reps at 70% 1RM, while the endurance session involved performing 2 sets of 21 reps at 50% 1RM, followed by a 120 second rest period. EE was calculated as the sum of oxygen uptake (aerobic component) and lactate production (anaerobic component) that was calculated as the difference between resting and peak lactate values multiplied by body weight (kg), then by an equivalent of 3.3 ml of O2. During RT sessions there was significant difference in EE between the hypertrophy (70% 1RM) 372.0 ± 22.1 kcal and endurance (50% 1RM) 305.4 ± 13.6 kcal, p = 0.0002. The aerobic energy metabolism of the session accounted for 96.2% and 94.3% of energy demand in hypertrophy and endurance sessions, respectively. Statistical analysis after session, revealed a significant difference in ...