High-volume resistance training session acutely diminishes respiratory muscle strength

This study investigated the effect of a high-volume compared to a low-volume resistance training session on maximal inspiratory pressure (mip) and maximal expiratory pressure (mep). twenty male subjects with resistance training experience (6.2 ± 3.2 y),in a crossover trial,completed two resistance training protocols (high-volume: 5 sets per exercise; low-volume: 2 sets per exercise) and a control session (no exercise) on 3 separate occasions. mip and mep decreased by 13.6% (p < 0.01) and 14.7% (p < 0.01) respectively from pre-session mip and mep,following the high-volume session. mip and mep were unaffected following the low-volume or the control sessions. mip returned to presession values after 40 minutes,whereas mep remained significantly reduced after 60 minutes post-session by 9.2% compared to pre-session (p < 0.01). the findings suggest that the highvolume session significantly decreased mip and mep postsession,implicating a substantially increased demand on the respiratory muscles and that adequate recovery is mandatory following this mode of training. © journal of sports science and medicine.