Table 2.
Oxygen consumption and its determinants at maximal exercise in endurance exercise-trained men
| Young men (28 years) | Older men (60 years) | Age-related change (%) | |
|---|---|---|---|
| Oxygen consumption (ml kg−1 min−1) | 68.2 | 49.4 | 28 |
| Cardiac output (l min−1) | 27.0 | 21.7 | 20 |
| Stroke volume (ml beat−1) | 147 | 132 | 10 |
| Heart rate (beats min−1) | 184 | 165 | 10 |
| a–v O2 difference (ml (100 ml)−1) | 16.7 | 15.2 | 8 |
The data were compiled from four studies in which values for all of the variables were reported in groups of young and older groups (Grimby et al. 1966; Hagberg et al. 1985; Rivera et al. 1989; Ogawa et al. 1992).