Time–Frequency Analysis of Muscle Activation Patterns during the Instep Kick in Elite and Amateur Soccer Players - Jiazhong Zhu; Diwei Chen; Dongxu Wang; Zhanyi Zhou; Yang Song; Xuanzhen Cen; Gusztáv Fekete; Monèm Jemni; Huw Wiltshire; Julien Steven Baker; Yaodong Gu; Dong Sun (Journal of Sports Science and Medicine, 2026)