Table 2.
Descriptive comparison of muscle strength measurements 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 | ||||||||
| MVC knee extensors | N | 358±100 | 365±99 | 347±103 | 0.340 | -18 | -5.0 | -76 | 39 |
| RFD knee extensors | N/s | 1564±858 | 1637±890 | 1469±823 | 0.515 | -168 | -10.3 | -568 | 322 |
| MVC knee flexors | N | 185±75 | 205±68 | 159±79 | 0.029 | -46 | -22.3 | -87 | -4 |
| RFD Knee flexors | N/s | 702±723 | 817±888 | 551±389 | 0.411 | -266 | -32.6 | -674 | 142 |
| MVC knee sum | N | 543±163 | 570±158 | 506±165 | 0.447 | -64 | -11.2 | -135 | 27 |
| RFD knee sum | N/s | 2266±1374 | 2454±1541 | 2020±1102 | 0.175 | -434 | -17.7 | -1213 | 344 |
| MVC/bm knee extensors | N/bm | 0.58±0.16 | 0.59±0.14 | 0.57±.018 | 0.291 | -0.02 | -4.0 | -0.11 | 0.07 |
| RFD/bm knee extensors | N/s/bm | 2.38±1.26 | 2.43±1.22 | 2.32±1.34 | 0.704 | -0.12 | -4.8 | -0.84 | 0.61 |
| MVC/bm knee flexors | N/bm | 0.30±0.13 | 0.33±0.10 | 0.27±0.15 | 0.060 | -0.06 | -18.6 | -0.13 | 0.01 |
| RFD/bm Knee flexors | N/s/bm | 1.07±0.87 | 1.16±0.95 | 0.95±0.75 | 0.390 | -0.21 | -18.0 | -0.70 | 0.29 |
| MVC ext/ mCSA thigh | N/cm2 | 4.46±1.08 | 4.55±1.03 | 4.34±1.15 | 0.411 | -0.21 | -4.6 | -0.83 | 0.40 |
| MVC flex/ mCSA thigh | N/cm2 | 2.32±0.91 | 2.55±0.74 | 2.02±1.03 | 0.024 | -0.53 | -21.0 | -1.03 | -0.04 |
| MVC sum/ mCSA thigh | N/cm2 | 6.79±1.81 | 7.11±1.64 | 6.36±1.96 | 0.128 | -0.74 | -10.5 | -1.76 | 0.27 |
GJH = Generalized Joint Hypermobility, JHS = Joint Hypermobility Syndrome, diff = difference, CI = Confidence Interval, MVC = Maximum Voluntary Contraction, RFD = Rate of Force Development, bm = body mass, mCSA = muscle Cross-Sectional Area. Significant differences between groups (p>0.05) are in bold.