Influence of Different Duration Foam Axis Rollings on Vertical Jump Performance of College Volleyball Players
Appropriate duration foam rollings can enhance muscle flexibility while activating neuromuscular pathways,but prolonged rolling may compromise strength performance.Twelve female college volleyball players underwent foam rolling at different times,followed by immediate,5-minutes,and 15-minutes countermovement jump(CMJ)tests after the rolling.A paired-samples T-test was employed to analyze the data.Research results 1)CMJ heights significantly increased after immediate,30s and 60s foam rolling compared to before intervention,but significantly decreased after 90s.Compared to 30-seconds rolling,CMJ heights significantly increased after rolling for 60s;2)After 5 minutes of intervention,CMJ heights significantly decreased after 90-seconds foam rolling compared to before intervention.When compared to 60s rolling,CMJ heights significantly decreased after rolling for 90s;3)After 15minutes foam rolling,CMJ heights significantly decreased after 30s,60s,and 90-s of foam rolling compared to before intervention.CMJ heights significantly decreased after rolling for 90s compared to rolling for 60s.30s and 60s of foam rolling can improve athletes'immediate CMJ performance immediately after intervention,whereas 90s rolling is detrimental to it.At the same time,the warming-up effect of foam rolling diminishes over time.
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