Table 2. Protocol of exercise test.
| Stage | Gradient (°) | Speed (m/s) | Time (min) |
| 0 | 3 | 0.0 | 0–2 |
| 1 | 3 | 3.0 | 2–4 |
| 2 | 3 | 3.4 | 4–6 |
| 3 | 3 | 3.8 | 6–8 |
| 4 | 3 | 4.2 | 8–10 |
| 5 | 3 | 4.6 | 10–12 |
| 6 | 3 | 5.0 | 12–14 |
| 7 | 3 | 5.4 | 14–max. exhaustion |
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