Hemodynamics and O 2 uptake during maximal knee extensor exercise in untrained and trained human quadriceps muscle: effects of hyperoxia

To elucidate the potential limitations on maximal human quadriceps O 2 capacity, six subjects trained (T) one quadriceps on the single-legged knee extensor ergometer (1 h/day at 70% maximum workload for 5 days/wk), while their contralateral quadriceps remained untrained (UT). Following 5 wk of tr…