Physiological and perceptual responses to incremental exercise testing in healthy men: effect of exercise test modality

摘要: In a randomized cross-over study of 15 healthy men aged 20-30 years, we compared physiological and perceptual responses during treadmill cycle exercise test protocols matched for increments in work rate - the source increased locomotor muscle metabolic contractile demands. The rates O2 consumption CO2 production were higher at peak versus testing (p ≤ 0.05). Nevertheless, rate, minute ventilation, tidal volume (VT), breathing frequency (fR), inspiratory capacity (IC), reserve (IRV), esophageal (Pes,tidal) transdiaphragmatic pressure swings (Pdi,tidal), expiratory gastric pressures (Pga,peak), root mean square diaphragm electromyogram (EMGdi,rms) expressed as percentage maximum EMGdi,rms (EMGdi,rms%max), dyspnea ratings similar > Ratings leg discomfort 0.05), even though was lower cycling. Oxygen consumption, production, fR, Pes,tidal, Pdi,tidal Pga,peak while VT, IC, IRV, EMGdi,rms%max, 0.05) all or most submaximal exercise. Our findings highlight important differences (and similarities) maximal incremental protocols. lack effect modality on advocates use this readily available parameter to optimize training intensity determination, regardless mode.