Efeito da intensidade do exercício prévio na resposta fisiológica e na performance aeróbia de curta duração

Abstract

-Athletes of different sports have frequently used warm-up exercises as preparation for the training session or competition. Increased metabolism and performance, as well as musculoskeletal injury prevention, are among the reasons that lead coaches to adopt this procedure. The effects of prior exercise have been studied to analyze the limiting factors of physiological adjustments at the beginning of exercise and its effects on subsequent exercise performance. Thus, this article analyzes studies that have investigated the effects of prior exercise on the cardiorespiratory and metabolic responses and short-term aerobic performance. In this context, factors such as prior exercise intensity and duration and recovery period between exercise sessions are discussed, and the possible mechanisms that could explain the effects of prior exercise are presented. The effects of prior exercise on the oxygen uptake (VO 2 ) kinetics do not seem to depend on the prior exercise intensity and recovery period between exercise sessions (i.e., prior and subsequent). However, the effects on exercise tolerance appear to depend on the interaction between the intensity of both exercises and the recovery period between them.

The effects of intensity on V̇O2 kinetics during incremental free swimming

“…The main findings were (i) the V O 2 kinetics pattern remained stable within the range of intensities corresponding to the low-moderate intensity (up to the LT boundary), reaching a steady state; and (ii) conversely, across the heavy-and severe-exercise intensities (above LT) faster (V O 2 kinetics shorter time-constant and time-delay values) and greater V O 2 gains in the primary component were noted, with the appearance of a noticeable slow component at ϳ130 s (⌬V O 2 > 250 mL•min −1 ). As a central interpretation of these findings, one could argue that the changes observed in the V O 2 kinetics parameters in the 6th and 7th steps of the incremental protocol might have been caused by the prior heavy exercise (i.e., 5th step) (Burnley et al 2011;Jones et al 2006), and not by the previous moderate steps (i.e., between the 1st and 4th steps) (Caritá et al 2015;Sousa et al 2014a).…”