Physiological responses to maximal 4 s sprint interval cycling using inertial loading: the influence of inter-sprint recovery duration.

Purpose: Interval exercise allows very high-power outputs to be maintained, a key for stimulating training adaptations. The main purpose of this study was to develop a sprint interval protocol that stimulated both anaerobic and aerobic systems while maximizing power output and minimizing fatigue. The secondary goal was to investigate the influence of inter-sprint recovery duration.