European Respiratory Society

Fig. 5. –

Fri, 2021-07-09 17:59 -- admin
Summary: 
Quadriceps maximal oxygen uptake (V′O2,leg) (y-axis) plotted against maximum work rate (x-axis) (mean±sem) in healthy subjects (▵) and in chronic renal patients (▪) breathing 13%, 21% and 100% inspired O2 concentrations (inspiratory oxygen fraction (FI,O2) 0.13, 0.21 and 1.0, respectively). While chronic renal patients increased V′O2,max and maximum work rate (Wmax) proportionally to the FI,O2 increase, indicating O2 supply dependency of V′O2,max, healthy sedentary subjects did not show any relationship between exercise performance and changes in O2 transport (and in cell oxygenation) suggesting that mitochondrial capacity, but not O2 transport, was limiting V′O2,max. Reproduced with permission from [12].
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F49
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