No differences in splenic emptying during on-transient supine cycling between aerobically trained and untrained participants

Purpose The role of splenic emptying in O 2 transport during aerobic exercise still remains a matter of debate. Our study compared the differences in spleen volume changes between aerobically trained and untrained individuals during step-transition supine cycling exercise at moderate-intensity. We also examined the relationship between spleen volume changes, erythrocyte release, and O 2 uptake parameters. Methods Fourteen healthy men completed all study procedures, including a detailed medical examination, supine maximal O 2 uptake ( V̇O_2 max.) test, and three step-transitions from 20 W to a moderate-intensity power output, equivalent to V̇O_2 uptake at 90