Biological sex does not influence the peak cardiac output response to twelve weeks of sprint interval training.

Sprint interval training (SIT) increases peak oxygen uptake (V̇O) but the mechanistic basis is unclear. We have reported that 12 wk of SIT increased V̇O and peak cardiac output (Q̇) and the changes in these variables were correlated. An exploratory analysis suggested that Q̇ increased in males but not females.