“…For each surf, judges score the surf based on the di culty, main maneuver type, speed, power, and uidity (Liu., 2015;Ferrier et al, 2018;Forsyth et al, 2021). This requires surfers to have great muscular endurance, explosive power (Lundgren et al, 2014;Anthony et al, 2016;Donaldson et al, 2022), excellent cardiorespiratory capacity (Bruton et al, 2013;Coyne et al, 2017;Donaldson et al, 2022), and balance stabilization control (Farley et al, 2016a;Forsyth et al, 2017). Among them, balance is the foundation for surfers to perform sur ng sports in the sea (Parsonage et al, 2017;Ma et al, 2020), which guarantees stabilizing the athlete's body posture in the waves to perform various technical movements.…”