| <40 vs 40-60 | <40 vs >60 | 40-60 vs >60 | |||
---|---|---|---|---|---|---|
 | adj. p-value |  | adj. p-value |  | adj. p-value |  |
Normalized RMS sEMG amplitude: | Â | Â | ||||
 standing/80 % MVC | 0.0132 | * | <0.001 | * | <0.001 | * |
 halfflexion/80 % MVC | 0.5237 | ns | 0.3351 | ns | 0.3351 | ns |
 maximum flexion/80 % MVC | <0.001 | * | <0.001 | * | 0.0032 | * |
Relative RMS sEMG amplitude changes between isometric positions (in percent): | Â | Â | ||||
 standing – half flexion | 0.8802 | ns | 0.0744 | ns | 0.0048 | * |
 standing - maximum flexion | 0.0168 | * | 0.1038 | ns | 0.5380 | ns |
 half - maximum flexion | 0.0038 | * | <0.001 | * | 0.0139 | * |
Half Flexion Relaxation ratio (HFR): | Â | Â | Â | Â | Â | Â |
 half/maximum flexion | <0.001 | * | <0.001 | * | 0.0217 | * |
Landmark positions (in degrees relative to the vertical): | Â | Â | Â | Â | Â | |
 mean standing TH4 | 0.1491 | ns | 0.5878 | ns | 0.5878 | ns |
 mean standing L5 | 0.4736 | ns | 0.1035 | ns | 0.4736 | ns |
Changes in position angles (in degrees): | Â | Â | ||||
 hip region (standing – maximum flexion) | 0.0152 | * | 0.0072 | * | 0.5311 | ns |
 lumbothoracic region (standing – maximum flexion) | <0.001 | * | <0.001 | * | 0.0145 | * |
 gross trunk region (standing – maximum flexion) | 0.6002 | ns | 0.3105 | ns | 0.4220 | ns |
 hip region (standing – half flexion) | <0.001 | * | 0.1096 | ns | 0.1357 | ns |
 lumbothoracic region (standing – half flexion) | 0.9999 | ns | 0.9999 | ns | 0.9999 | ns |
 gross trunk region (standing – half flexion) | 0.0756 | ns | 0.6012 | ns | 0.6012 | ns |
 % hip of gross trunk region (half flexion) | <0.001 | * | <0.001 | * | 0.0384 | * |
 % lumbothoracic of gross trunk region (half flexion) | <0.001 | * | <0.001 | * | 0.0429 | * |
 % hip of gross trunk region (maximum flexion) | 0.9999 | ns | 0.9999 | ns | 0.9999 | ns |
 % lumbothoracic of gross trunk region (maximum flexion) | 0.9999 | ns | 0.9999 | ns | 0.9999 | ns |