The Influence of Countermovement Jump Protocol on Reactive Strength Index Modified and Flight Time: Contraction Time in Collegiate Basketball Players

Sports

Bryce Daub¹  Michael Bemben²  Aaron Heishman²  Brady Brown²  Ryan Miller²  Eduardo Freitas² 

[1] Department of Athletics, Basketball Strength and Performance, University of Oklahoma, Norman, OK 73019, USA;Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019, USA;

关键词: athlete monitoring;    athlete performance;    collegiate basketball;    fatigue monitoring;    countermovement jump;    CMJ arm swing;    CMJ without arm swing;   

DOI  :  10.3390/sports7020037

来源: DOAJ

【 摘 要 】

The purpose of the present investigation was to evaluate differences in Reactive Strength Index Modified (RSI_Mod) and Flight Time to Contraction Time Ratio (FT:CT) during the countermovement jump (CMJ) performed without the arm swing (CMJNAS) compared to the CMJ with the arm swing (CMJAS), while exploring the relationship within each variable between jump protocols. A secondary purpose sought to explore the relationship between RSI_Mod and FT:CT during both jump protocols. Twenty-two collegiate basketball players performed both three CMJNAS and three CMJAS on a force plate, during two separate testing sessions. RSI_Mod was calculated by the flight-time (RSI_Mod^FT) and impulse-momentum methods (RSI_Mod^IMP). CMJ variables were significantly greater during the CMJAS compared to CMJNAS (p < 0.001). There were large to very large correlations within each variable between the CMJAS and CMJNAS. There were significant positive correlations among RSI_Mod^FT, RSI_Mod^IMP, and FT:CT during both the CMJAS (r ≥ 0.864, p < 0.001) and CMJNAS (r ≥ 0.960, p < 0.001). These findings identify an increase in RSI_Mod or FT:CT during the CMJAS, that may provide independent information from the CMJNAS. In addition, either RSI_Mod or FT:CT may be utilized to monitor changes in performance, but simultaneous inclusion may be unnecessary.

【 授权许可】

Unknown