Table 2.
Intensity levels of stress testing.
| Intensity | Dynamic exercise | Dobutamine stress | Isometric exercise | |
|---|---|---|---|---|
| Light | METs: | ≤4 METs | 0–10 μg/kg/min | All |
| Ergometer: | 50 W | |||
| Treadmill: | Stage 1 BP | |||
| HRmax: | ≤54% | |||
| Statement: | Light | |||
| Moderate | METs: | 5–8 METs | 11–20 μg/kg/min | – |
| Ergometer: | 75–125 W | |||
| Treadmill: | Stage 2 BP | |||
| HRmax: | 55–84% | |||
| Statement: | Submaximal/ moderate | |||
| High | METs: | > 8 METs | >20 μg/kg/min | – |
| Ergometer: | > 125 W (< 70 kg: > 100 W) | HRmax: ≥ 85% Symptoms | ||
| Treadmill: | ≥ stage 3 BP | |||
| HRmax: | ≥ 85% | |||
| Statement: | Exhaustion | |||
METs indicates metabolic equivalents (1MET = 3.5 ml O2kg−1min−1); W, watt; BP, standard Bruce protocol; HRmax, age-predicted maximal heart rate (= 220–age in years).