Figure 1. Flowchart of the methodology of this study. Two tasks were performed on separate days: PL intervention in which a Thera-Band was placed on the ball of the foot and pushed out from the contact point, and PB intervention with Thera-Band^® pulled out from the base of the fifth metatarsal, emphasizing external rotation and valgus of the ankle. The CSA and thickness of the PL and PB at proximal 25% (indicates the morphology of PL) and distal 75% (indicates the morphology of PB), and PL and PB strength tests were conducted before (pre-intervention) and immediately after the intervention (post-intervention) and at 10, 20, and 30 min later. PL: peroneus longus, PB: peroneus brevis, CSA: cross-sectional area.