morethan 10 mmHg at any time during the test the previous successfulmovement was recorded as their score. However, all five stages ofthe Sahrmann test were attempted and the test ceased after theparticipants had finished all movements or could not progress tothe next level. The participant was given a 2-min rest period inbetween trials to account for fatigue.A pilot study was initially conducted to assess the reliability ofultrasound measurements. Nine participants aged between 18 and50 had two repeated snapshot images of resting and contractedTrA conducted twice on the same day. The reliability of the operatortesting techniques was established through determination of intra-class correlation coefficient and typical error.