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The effect of previous loading cycles on the reliability of a clinical measure of hamstring flexibility
Arthur Woznowski-Vu1, Richard Preuss
1School of Physical and Occupational Therapy, McGill University.
Purpose:
The aim of the study was to determine the effect of successive repetitions of a measure of hamstring flexibility-the passive unilateral straight leg raise (SLR)-on the reliability of this measure.
Method:
Ten repetitions of the SLR were performed on nine healthy adults. Measures were quantified using an electromagnetic tracking system and standardized using a handheld dynamometer by stopping the SLR at a set end-point force. The 10 repetitions were analyzed as two blocks of five, and intra-class correlation coefficients-models (2,1) and (3,k)-were calculated for each block of data.
Results:
ICC values for both models were comparable between the two blocks of data.
Conclusion:
Previous loading cycles, to a set end-point force, are unlikely to improve the reliability of muscle flexibility assessment in a clinical setting.
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