Table 2.
Kinematic and kinetic reliability values for the up-down hop test
| Trials | ||
|---|---|---|
| Kinematics | Mean (°) ± SD 95% CI (°) ICC (SEM°) ICC 95% CI |
Mean (°) ± SD 95% CI (°) ICC (SEM°) ICC 95% CI |
| Single Trial | 2-Trial Avg | |
| Hip flexion | 36.95 ± 7.56 | 38.69 ± 7.37 |
| 36.34-42.96 | 36.19-41.19 | |
| .95a (1.69) | .97 (1.28) | |
| .82-.99 | .90-.99 | |
| Hip adduction | 9.72 ± 7.42 | 9.14 ± 7.17 |
| 5.87-13.57 | 6.71-11.58 | |
| .93a (1.96) | .97 (1.24) | |
| .76-.98 | .87-.99 | |
| Hip internal rotation | 7.59 ± 7.53 | 7.78 ± 7.42 |
| 5.04-10.15 | 5.72-9.84 | |
| .97a (1.30) | .98 (1.05) | |
| .89-.99 | .94-1.0 | |
| Knee flexion | 51 ± 4.25 | 49.55 ± 5.39 |
| 47.01-54.99 | 45.74-53.36 | |
| .77a (2.04) | .87 (1.94) | |
| .36-.94 | .53-.97 | |
| Knee valgus | 7.49 ± 5.97 | 6.25 ± 4.88 |
| 4.63-10.36 | 4.59-7.90 | |
| .94a (1.46) | .97 (.85) | |
| .79-.99 | .88-.99 | |
| Knee external rotation | 10.12 ± 8.09 | 8.96 ± 7.93 |
| 5.92-14.32 | 6.27-11.65 | |
| .93a (2.14) | .97 (1.37) | |
| .76-.98 | .86-.99 | |
| Kinetics | 2.67 ± .57 | 2.80 ± .39 |
| 2.29-3.06 | 2.61-2.99 | |
| GRF (BW) | .88a (.20) | .94 (.10) |
| .65-.96 | .79-.98 | |
| Contact time (seconds) | .04 ± .03 | .07 ± .02 |
| .03-.05 | .07-.08 | |
| .97a (.01) | .99 (0.0) | |
| .91-.99 | .95-1.0 | |
SD: standard deviation; ICC: Intraclass Correlation Coefficient; SEM: standard error of measurement estimated using SD of the score; 95% CI: confidence interval based on SEM; GRF: ground reaction forces/times body weight.
a
Intraclass correlation coefficients for a single trial (ICC [3, 1]) were calculated based on the number of multiple trials used by the following formula: between subjects mean square − error mean square / between subjects mean square + (k-1) error mean square (Figure 3).14