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A: simulated ATP usage activity-exercise duration curves (corresponding to power-duration curves) for “standard” oxidative phosphorylation (OXPHOS) activity kOX (kOX *1), kOX diminished by 10% (kOX * 0.9), and kOX enlarged by 10% (kOX * 1.1); B: simulated ATP usage activity-exercise duration curves for “standard” each-step activation (ESA) intensity AOXmax (AOXmax = 5), AOXmax diminished by 10% (AOXmax = 4.5), and AOXmax enlarged by 10% (AOXmax = 5.5).
