Absolute reliability of physical activity and sedentary behaviour (hours/day) for the ActiGraph GT3X+ VM, VT and activPAL3
| Activity type | ActiGraph GT3X+ | activPAL3 | |
| Vector Magnitude ICC (95% CI) (% time) | Vertical Axis ICC (95% CI) (% time) | ICC (95% CI) (% time) | |
| Light activity | 0.87 (0.73 to 0.94) | 0.91 (0.82 to 0.96) | 0.90 (0.79 to 0.95) |
| Moderate activity | 0.88 (0.75 to 0.95) | 0.66 (0.30 to 0.84) | 0.87 (0.72 to 0.94) |
| Vigorous | 0.87 (0.72 to 0.94) | 0.89 (0.77 to 0.95) | N/A |
| MVPA | 0.88 (0.75 to 0.94) | 0.67 (0.31 to 0.84) | 0.87 (0.72 to 0.94) |
| Sedentary behaviour | 0.91 (0.81 to 0.96) | 0.93 (0.86 to 0.97) | 0.93 (0.85 to 0.97) |
Note: ICCs reported for the per cent of wear time for each behaviour category.
ICC, intraclass correlation coefficients; MVPA, moderate-to-vigorous activity; VM, Vector Magnitude; VT, Vertical Axis.