Procedure
Participants were assessed for lower extremity muscle strength and functional outcomes for the pre-intervention test. Then, the participants were randomized into the groups and underwent the eight-week intervention program. The post-test was carried out following by the same sequences as the pre-test. To prevent cross-over effects, all included participants were prohibited from engaging in other rehabilitation programs during the protocol period. Also, on the pre-and post-assessment day, the participants were requested to avoid alcohol and to refrain from caffeine and consumption of painkillers.