Table 3.
Summary statistics and statistical comparisons of energy expenditure (EE) for each consumer monitor and the Cosmed K4b2 across approximately 148 minutes of measurement.
| Monitor | N | K4b2 Measured EE (kcals) | Predicted EE (kcals) | Mean Difference (measured-predicted) | Lower 95% Limit of Agreement | Upper 95% Limit of Agreement |
|---|---|---|---|---|---|---|
| Apple Watch Series 2 (net active EE) | ||||||
| All Participants* | 64 | 269.9 (82.8) | 146.8 (76.3) | 121.8 | 69.9 | 331.3 |
| Age Group | ||||||
| 6 – 12 (y) | 33 | 220.5 (49.8) | 94.9 (26.3) | |||
| 13 – 18 (y) | 31 | 322.5 (78.8) | 201.9 (73.3) | |||
| Fitbit Charge 2 (gross EE) | ||||||
| All Participants* | 38 | 426.8 (129.5) | 564.5 (205.3) | −137.7 | −470.1 | 194.8 |
| Age Group | ||||||
| 6 – 12 (y) | 26 | 374.9 (96.9) | 500.4 (178.1) | |||
| 13 – 18 (y) | 12 | 539.5 (121.9) | 703.6 (197.3) | |||
| Samsung GearFit2 (gross EE) | ||||||
| All Participants* | 23 | 480.2 (154.1) | 337.0 (128.9) | 143.2 | −44.9 | 331.3 |
| Age Group | ||||||
| 6 – 12 (y) | 13 | 382.6 (90.7) | 252.1 (82.5) | |||
| 13 – 18 (y) | 10 | 607.1 (124.1) | 447.5 (86.7) | |||
| Misfit Shine 2 – Hip (gross EE) | ||||||
| All Participants* | 21 | 455.4 (128.4) | 399.4 (123.8) | 56.0 | −77.9 | 189.8 |
| Age Group | ||||||
| 6 – 12 (y) | 12 | 390.2 (70.0) | 331.1 (69.2) | |||
| 13 – 18 (y) | 9 | 542.3 (140.0) | 490.6 (124.0) | |||
| Misfit Shine 2 – Shoe (gross EE) | ||||||
| All Participants* | 19 | 451.1 (138.3) | 387.6 (116.2) | 63.5 | −98.6 | 225.5 |
| Age Group | ||||||
| 6 – 12 (y) | 11 | 377.6 (73.0) | 324.6 (59.7) | |||
| 13 – 18 (y) | 8 | 552.2 (146.3) | 474.4 (121.5) | |||
| Mymo (gross EE) | ||||||
| All Participants | 65 | 455.9 (142.7) | 471.9 (178.5) | −15.9 | −519.1 | 487.2 |
| Age Group# | ||||||
| 6 – 12 (y) | 40 | 382.4 (92.3) | 502.3 (185.0) | |||
| 13 – 18 (y) | 25 | 455.9 (130.6) | 423.2 (178.5) |