Abstract
This study examined physiological and perceptual responses to matched work high-intensity
interval training using all-out and 2 even-paced methodologies. 15 trained male cyclists
performed 3 interval sessions of three 3-min efforts with 3 min of active recovery
between efforts. The initial interval session was completed using all-out pacing,
with the following 2 sessions being completed with computer- and athlete-controlled
pacing in a randomised and semi-counterbalanced manner. Computer- and athlete-controlled
intervals were completed at the mean power from the corresponding interval during
the all-out trial. Oxygen consumption and ratings of perceived exertion were recorded
during each effort. 20 min following each session, participants completed a 4-km time
trial and provided sessional rating of perceived exertion. Oxygen consumption was
greater during all-out (54.1±6.6 ml.kg−1.min−1; p<0.01) and athlete-controlled (53.0±5.8 ml.kg−1.min−1; p<0.01) compared with computer-controlled (51.5±5.7 ml.kg−1.min−1). Total time ≥85% maximal oxygen consumption was greater during all-out compared
to both even-paced efforts. Sessional ratings of perceived exertion were greater after
all-out compared to both even-paced sessions. Mean 4-km power output was lower after
all-out compared with both even paced intervals. Distribution of pace throughout high-intensity
interval training can influence perceptual and metabolic stress along with subsequent
performance and should be considered during the prescription of such training.
Key words
pacing - training - cyclist - endurance performance
