Table 4.
Descriptive comparison of stair climbing as a functional activity. Parameters of ground reaction force and electromyography as mean±standard deviation (sd).
| All (n=51) mean±sd | GJH (n=29) mean±sd | JHS (n=22) mean±sd | Mann- Whitney-U p | Mean diff. | Mean diff. % | 95% CI | |||
|---|---|---|---|---|---|---|---|---|---|
| Lower | Upper | ||||||||
| t to Fmax up | ms | 0.203±0.030 | 0.209±0.031 | 0.196±0.029 | 0.117 | -0.013 | -6.2 | -0.030 | 0.004 |
| Fmax/bm up | %bm | 109.0±6.3 | 108.0±5.6 | 110.0±7.1 | 0.332 | 2.1 | 1.9 | -1.5 | 5.6 |
| Loading rate up | %bm/s | 118.0±42.2 | 114.0±46.8 | 123.0±35.7 | 0.189 | 8.9 | 7.8 | -15.2 | 33.0 |
| Contact time up | ms | 0.750±0.088 | 0.774±0.084 | 0.719±0.084 | 0.015 | -0.056 | -7.2 | -0.103 | -0.008 |
| t to Fmax down | ms | 0.164±0.022 | 0.163±0.023 | 0.166±0.020 | 0.304 | 0.003 | 2.1 | -0.009 | 0.016 |
| Fmax/bm down | %bm | 141.0±13.2 | 143.0±12.8 | 138.0±13.4 | 0.140 | -5.0 | -3.5 | -12.4 | 2.5 |
| Loading rate down | %bm/s | 162.0±46.6 | 162.0±44.4 | 161.0±50.4 | 0.947 | -0.9 | -0.6 | -27.7 | 25.8 |
| Contact time down | ms | 0.717±0.094 | 0.741±0.088 | 0.685±0.095 | 0.032 | -0.056 | -7.6 | -0.108 | -0.004 |
| Biceps femoris max up | %MVC | 13.6±14.8 | 9.1±5.4 | 18.9±20.0 | 0.026 | 9.7 | 106.5 | 1.5 | 17.9 |
| Semitendinosus max up | %MVC | 15.8±13.8 | 13.1±9.2 | 19.0±17.6 | 0.355 | 5.9 | 45.4 | -1.9 | 13.8 |
| Vastus lateralis max up | %MVC | 40.2±21.7 | 35.0±17.0 | 47.2±25.5 | 0.074 | 12.3 | 35.0 | -0.1 | 24.5 |
| Vastus medialis max up | %MVC | 40.5±26.1 | 37.3±28.3 | 45.0±22.6 | 0.099 | 7.7 | 20.6 | -7.3 | 22.7 |
| Biceps femoris max down | %MVC | 7.4±8.8 | 5.9±4.2 | 9.3±12.1 | 0.576 | 3.4 | 58.1 | -1.7 | 8.5 |
| Semitendinosus max down | %MVC | 9.5±10.7 | 8.3±9.1 | 11.1±12.4 | 0.912 | 2.8 | 34.2 | -3.4 | 9.0 |
| Vastus lateralis max down | %MVC | 22.6±14.0 | 21.3±15.8 | 24.5±11.3 | 0.095 | 3.2 | 15.2 | -4.9 | 11.3 |
| Vastus medialis max down | %MVC | 22.9±14.0 | 21.1±15.3 | 25.2±11.8 | 0.087 | 4.1 | 19.3 | -4.0 | 12.1 |
GJH = Generalized Joint Hypermobility, JHS = Joint Hypermobility Syndrome, diff = difference, CI = Confidence Interval, Fmax = maximum force peak during weight acceptance. Significant differences between groups (p>0.05) are in bold.