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Biology 105
Biology of Exercise
Spring 2003
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| digestive tract, liver | 27% | 1350 ml/min | 4.8% | 600 | |
| kidneys | 20% | 1000 | 4.4% | 550 | |
| skin | 9% | 450 | 13.6% | 1700 | |
| brain | 13% | 650 | 5.2% | 650 | |
| skeletal muscle | 15% | 750 | 64% | 8000 | |
| bone | 13% | 650 | 3.6% | 450 | |
| heart | 3% | 150 | 4.4% | 550 | |
| total | 100% | 5000 ml/min | 100% | 12,500 ml/min |
adapted from Sherwood, Human physiology, 1999, p. 317
Cardiac output during heavy exercise
| Heart rate (bpm) | Stroke Volume (ml) | Cardiac output | |
| Rest | 60 | 83 | 5000 ml/min |
| Heavy Exercise | 200 | 160 | 32,000 ml/min |
Oxygen delivery during exercise
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Cardiac output (m/minl) |
O2 delivered per 100 ml blood (ml O2 / 100 ml) |
Total oxygen delivery (VO2) (ml O2 / min) |
Total oxygen delivery for a 70 kg person (ml O2 / min / kg body wt) |
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| Rest | 5000 | 5 | 250 ml | 3.5 |
| Heavy Exercise | 32,000 | 15 | 4800 ml | 68 (This is VO2max) |
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