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Mean power frequency (MPF) of the abductor pollicis brevis (APB) and extensor pollicis brevis (EPB) muscles over the test period. One-way analysis of variance was used to compare the MPF of the APB and EPB between 0 min, 10 min, 20 min and 30 min. Data are expressed as mean ± SD. ▲P < 0.05 among 0 min, 10 min, 20 min and 30 min. *P < 0.05 versus 0 min (post-hoc analysis).
