“…Afterwards, subjects had a surface electromyography device attached to them, landed on a 30cm high box to the landing point, and held the position for 3 seconds. Data analysis used muscle activity values measured 100ms after the subject's first contact, and measurements were performed three times and the average value was used [31]. The measured data were normalized using the maximum isometric contraction measured according to the manual muscle strength assessment method presented by Kendall et al [32].…”