Table 4.
External mechanical work and potential-kinetic energy transduction at standard walking speed (SWS).
| Variable | UCP (n = 10) | TD (n = 10) | P-value | ||
|---|---|---|---|---|---|
| Overground | Treadmill | Overground | Treadmill | ||
| Wext, J·kg−1.m−1 | 0.44 ± 0.09 | 0.49 ± 0.13 | 0.36 ± 0.06 | 0.39 ± 0.05 | 0.38*† |
| Wp, J·kg−1.m−1 | 0.56 ± 0.08 | 0.60 ± 0.09 | 0.46 ± 0.08 | 0.45 ± 0.10 | 0.10† |
| Wk, J·kg−1.m−1 | 0.66 ± 0.09 | 0.66 ± 0.16 | 0.63 ± 0.10 | 0.62 ± 0.08 | 0.69 |
| Wkf, J·kg−1.m−1 | 0.64 ± 0.09 | 0.63 ± 0.15 | 0.61 ± 0.09 | 0.60 ± 0.08 | 0.99 |
| Wkv, J·kg−1.m−1 | 0.07 ± 0.02 | 0.09 ± 0.02 | 0.04 ± 0.01 | 0.05 ± 0.01 | 0.014*† |
| Wkl, J·kg−1.m−1 | 0.04 ± 0.02 | 0.05 ± 0.02 | 0.02 ± 0.00 | 0.02 ± 0.00 | 0.002*† |
| R, % | 64.2 ± 7.0 | 59.3 ± 8.1 | 66.5 ± 4.1 | 63.0 ± 5.6 | 0.53* |
| Wk/Wp | 1.19 ± 0.23 | 1.10 ± 0.21 | 1.40 ± 0.26 | 1.46 ± 0.45 | 0.12† |
| α, ° | 24.2 ± 11.7 | 28.0 ± 10.1 | 23.1 ± 9.7 | 26.1 ± 12.2 | 0.85 |
| β, ° | 23.1 ± 9.7 | 26.0 ± 10.7 | 13.7 ± 8.2 | 15.7 ± 10.3 | 0.73† |
Mean values ± standard deviation (SD). n, number of participants; UCP, unilateral cerebral palsy adolescents; TD, typically developing adolescents. Wext, external mechanical work; Wp, potential mechanical work; Wk, kinetic mechanical work; Wkf, forward kinetic mechanical work; Wkv, vertical kinetic mechanical work; Wkl, lateral kinetic mechanical work; R, recovery; α, phase shift between the maximum of Ek and the minimum of Ep; β, phase shift between the minimum of Ek and the maximum of Ep; P-value, P value for interaction [condition (overground vs. treadmill) x group (UCP vs. TD)] of the 2-way repeated-measures mixed design ANOVA.
For significant condition (overground vs. treadmill) effect;
For significant group (UCP vs. TD) effect (P ≤ 0.05).