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The study investigates how exercise training affects oxygen uptake kinetics and the power-duration relationship in untrained males.

Relationship Between Exercise Training-Induced Changes in Oxygen Uptake Kinetics and the Power-Duration Relationship

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Examines training effects on oxygen uptake kinetics and power-duration metrics in healthy males, suggesting complex relationships among variables.

The study investigates how exercise training affects oxygen uptake kinetics and the power-duration relationship in untrained males.
Eleven healthy untrained males underwent 2 weeks of severe-intensity exercise training.
V̇O2max was assessed via incremental exercise tests on a cycle ergometer before and after training.
CP and W' were determined through constant power trials.
V̇O2 kinetics were assessed during exercise above CP after training.
A computer model analyzed bioenergetic changes.
CP and τVO2 were strongly inversely correlated before and after training.
Training increased W' and reduced the V̇O2sc amplitude, but changes in W' and V̇O2sc were uncorrelated.
Increased oxidative phosphorylation activity primarily explained changes in CP and τVO2.
Model simulations indicated factors affecting W' and V̇O2sc included accessible phosphate and peak inorganic phosphate concentrations.

Lei et al. (2026) studied this question.

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Examines training effects on oxygen uptake kinetics and power-duration metrics in healthy males, suggesting complex relationships among variables.