Hardcastle Takes a HIT! Commentary: Why Sprint Interval Training is Inappropriate for a Largely Sedentary population. | Insight Medical Publishing

Our previous paper prompted a lively debate concerning the ？？？？c？？cy of sprint interval training (SIT) [1,2]. For clarification SIT refers to protocols that involve supramaximal efforts (>100% maximal oxygen uptake) and high-intensity-intervaltraining (HIIT) involves ‘vigorous’ or ‘near-maximal’ efforts (target intensity: 80% to 100% peak heart-rate) [3]. In the current commentary, we return to the role of affect and perceived effort on exercise adherence raised in the recent commentary by Jung et al. [4]. We contend that the considerable anticipated effort required to participate in SIT and aversive psychological states experienced during such 'all out' supramaximal exercise may likely to damage adherence to such protocols.