Quantifying the effects of four weeks of low-volume high-intensity sprint interval training on V ̇O2max through assessment of hemodynamics.

CONCLUSIONS: V̇O2max is a function of maximal cardiac output and a-vO2dif-max, so for a meaningful change to occur in cardiorespiratory fitness, there must be a concomitant increase in O2 delivery. This study demonstrates that a low volume SIT intervention evokes peripherally mediated responses (a-vO2dif) and anaerobic substrate utilization rather than O2 delivery components. Future works should address the time course of the responses and when assessing V̇O2max-based responses that due attention be given to the hemodynamic responses as means of quantification of the response. PMID: 32008311 [PubMed - in process]
Source: Journal of Sports Medicine and Physical Fitness - Category: Sports Medicine Tags: J Sports Med Phys Fitness Source Type: research