|Table 1: Subject characteristics.|
|Values expressed as mean (standard deviation).|
for all comparisons.
Passive hip lateral rotation with pelvis stabilized, measured in prone with an inclinometer.
Femoral anteversion measured with a goniometer using methods described by Ruwe et al. .
Generalized joint hypermobility measured with Beighton Hypermobility Scale .
Relative motion index calculated as the amount of hip lateral rotation completed prior to the start of lumbopelvic rotation.
Pain measured using a verbal numeric pain rating scale .
Disability measured using modified Oswestry Disability Index .
A flare-up is defined as a period (usually a week or less) when back pain is markedly more severe than usual .