Table 4 Heuristic cadence thresholds (steps/min) for relatively-defined moderate and vigorous intensity based on segmented regression and ROC curve analyses
From: Cadence (steps/min) and relative intensity in 21 to 60-year-olds: the CADENCE-adults study
| Â | Â | Â | Â | Age Groups (years) | Â | Â |
|---|---|---|---|---|---|---|
Intensity Level | Intensity Indicator | Measure | Group 1 (21–30) | Group 2 (31–40) | Group 3 (41–50) | Group 4 (51–60) |
Moderate Intensity | ≥ 64%HRmax | Threshold (steps/min) | 120 | 120 | 115 | 110 |
Se | 87.5 | 80.0 | 82.7 | 66.7 | ||
Sp | 86.2 | 87.1 | 81.1 | 79.6 | ||
PPV | 48.6 | 51.4 | 47.2 | 50.5 | ||
NPV | 97.9 | 96.2 | 95.8 | 88.4 | ||
Accuracy | 86.4 | 96.2 | 95.8 | 88.4 | ||
≥ 40%HRR | Threshold (steps/min) | 120 | 120 | 115 | 110 | |
Se | 91.8 | 82.4 | 85.0 | 83.9 | ||
Sp | 89.6 | 89.1 | 83.7 | 82.9 | ||
PPV | 62.5 | 60.0 | 56.0 | 57.1 | ||
NPV | 98.3 | 96.2 | 95.8 | 95.0 | ||
Accuracy | 90.0 | 88.0 | 84.0 | 83.1 | ||
≥ 12 RPE | Threshold (steps/min) | 120 | 120 | 115 | 110 | |
Se | 76.7 | 61.2 | 68.0 | 67.0 | ||
Sp | 90.6 | 92.0 | 88.0 | 86.5 | ||
PPV | 68.1 | 74.3 | 72.5 | 71.4 | ||
NPV | 93.7 | 86.2 | 85.6 | 83.9 | ||
Accuracy | 87.7 | 83.5 | 81.7 | 80.0 | ||
Vigorous Intensity | ≥ 77%HRmax | Threshold (steps/min) | 135 | 130 | 125 | 120 |
Se | 55.6 | 69.2 | 82.3 | 78.6 | ||
Sp | 97.0 | 93.9 | 90.0 | 87.3 | ||
PPV | 35.7 | 33.3 | 32.6 | 23.9 | ||
NPV | 98.6 | 98.6 | 98.9 | 98.8 | ||
Accuracy | 95.8 | 92.9 | 89.5 | 86.9 | ||
≥ 60%HRR | Threshold (steps/min) | 135 | 130 | 125 | 120 | |
Se | 60.0 | 62.5 | 76.2 | 78.6 | ||
Sp | 97.3 | 94.2 | 90.5 | 87.3 | ||
PPV | 42.9 | 37.0 | 89.5 | 23.9 | ||
NPV | 98.6 | 97.9 | 37.1 | 98.8 | ||
Accuracy | 96.1 | 92.6 | 89.5 | 86.9 | ||
≥ 14 RPE | Threshold (steps/min) | 135 | 130 | 125 | 120 | |
Se | 50.0 | 63.2 | 61.9 | 81.0 | ||
Sp | 98.0 | 94.8 | 89.5 | 89.2 | ||
PPV | 95.5 | 92.9 | 87.6 | 88.6 | ||
NPV | 57.1 | 44.4 | 30.2 | 37.0 | ||
Accuracy | 97.3 | 97.5 | 97.0 | 98.4 |