One potential reason for the equivocal findings could be because prior research did not take into consideration a person’s need for full hip rotation motion during regularly performed activities. It is possible that a limitation in hip mobility may contribute to a person’s LBP problem only if the person repeatedly performs activities that require full range of a particular direction of hip and trunk motion. Thus, one way to better understand the nature of the hip rotation-LBP relationship would be to examine hip rotation mobility and LBP in people who place regular end-range rotational demands on the hip and the trunk, particularly in a weight-bearing situation. Recently, Vad and colleagues reported on two cohorts of men who put repeated, end range rotational demands on the hip and trunk; professional tennis players (Vad et al., 2003) and professional golfers (Vad et al., 2004). In both studies, players with LBP displayed asymmetry of hip medial rotation between the lead and non-lead hip that was not present in players without LBP. Asymmetries of motion were also found with the FABERE test. In the FABERE test the hip is passively flexed to place the foot on the opposite knee and then maximally abducted, laterally rotated and extended. Although not a specific measure of hip lateral rotation, the authors suggested that the FABERE test findings indicated a potential difference in the amount of hip lateral rotation between sides in the LBP group that was not present in the group without LBP.