Table 2 Correlation and agreement estimates between the Captury and Vicon systems when measuring through range kinematicsa in squats and standing broad jumps
Variable | Range of Motion | Correlation and Agreement Estimates | |||||
|---|---|---|---|---|---|---|---|
Vicon | Captury | RMC | RMSE | LLoA | MD | ULoA | |
Squats | |||||||
Knee Flexion (°) | −21.7 to 146.0 | −17.1 to 161.2 | 0.99 | 6.4 | −25.1 | −10.8 | 3.5 |
Hip Flexion (°) | −10.9 to 111.9 | −19.6 to 125.2 | 0.92 | 11.4 | − 32.9 | −0.6 | 31.8 |
Ankle Dorsi Flexion (°) | −42.8 to 52.1 | − 64.6 to 60.9 | 0.95 | 4.3 | −13.5 | − 1.0 | 11.5 |
Knee Varus (°) | −30.4 to 43.5 | −28.8 to 20.8 | 0.28 | 5.9 | −32.5 | − 6.7 | 19.1 |
FP Projection Angle (°) | − 164.0 to 176.2 | − 179.9 to 179.9 | 0.74 | 15.7 | − 84.1 | −5.9 | 72.3 |
FP Knee Angle (°) | −10.7 to 29.7 | −16.6 to 37.5 | 0.83 | 3.7 | −9.2 | 0.7 | 10.5 |
FP Knee Deviation (mm) | −34.2 to 146.0 | −52.4 to 176.1 | 0.88 | 10.6 | −33.6 | −1.1 | 31.4 |
Knee-Hip SDR (ratio) | 0.71 to 3.73 | 0.42 to 3.89 | 0.96 | 0.08 | −0.36 | 0.01 | 0.38 |
Ankle-Hip SDR (ratio) | 0.47 to 2.01 | 0.42 to 1.96 | 0.88 | 0.05 | −0.26 | 0.03 | 0.32 |
Jumps | |||||||
Knee Flexion (°) | −17.0 to 136.9 | −15.0 to 155.1 | 0.93 | 10.4 | −26.4 | −3.6 | 19.3 |
Hip Flexion (°) | −9.1 to 116.9 | −16.6 to 141.0 | 0.77 | 16.9 | −34.1 | 7.4 | 49.0 |
Ankle Dorsi Flexion (°) | −56.9 to 49.5 | − 80.3 to 63.5 | 0.88 | 11.0 | −32.4 | 3.6 | 39.6 |
FP Projection Angle (°) | −176.7 to 177.6 | −179.2 to 178.6 | 0.38 | 20.3 | −66.0 | −0.2 | 66.4 |
FP Knee Angle (°) | −45.2 to 85.8 | −47.7 to 90.7 | 0.75 | 6.6 | −14.8 | 0.5 | 15.8 |
FP Knee Deviation (mm) | −33.1 to 81.9 | − 67.8 to 149.7 | 0.63 | 12.6 | −45.7 | −1.0 | 43.8 |
Knee-Hip SDR (ratio) | 0.67 to 3.29 | 0.42 to 3.71 | 0.95 | 0.11 | −0.42 | 0.02 | 0.45 |
Ankle-Hip SDR (ratio) | 0.53 to 5.83 | 0.57 to 6.55 | 0.98 | 0.13 | −0.46 | 0.02 | 0.49 |