PURPOSE: To evaluate whether the dynamic strength index (DSI: ballistic peak force/isometric peak force) could be effectively used to guide specific training interventions and detect training-induced changes in maximal and ballistic strength. METHODS: Twenty-four elite male athletes were assessed in the isometric bench press and a 45% 1-repetition-maximum (1RM) ballistic bench throw using a force plate and linear position transducer. The DSI was calculated using the peak force values obtained during the ballistic bench throw and isometric bench press. Athletes were then allocated into 2 groups as matched pairs based on their DSI and strength in the 1RM bench press. Over the 5 wk of training, athletes performed either high-load (80-100% 1RM) bench press or moderate-load (40-55% 1RM) ballistic bench throws. RESULTS: The DSI was sensitive to disparate training methods, with the bench-press group increasing isometric bench-press peak force (P=.035, 91% likely), and the ballistic-bench-throw group increasing bench-throw peak force to a greater extent (P≤.001, 83% likely). A significant increase (P≤.001, 93% likely) in the DSI was observed for both groups. CONCLUSIONS: The DSI can be used to guide specific training interventions and can detect training-induced changes in isometric bench-press and ballistic bench-throw peak force over periods as short as 5 wk.
PURPOSE: To evaluate whether the dynamic strength index (DSI: ballistic peak force/isometric peak force) could be effectively used to guide specific training interventions and detect training-induced changes in maximal and ballistic strength. METHODS: Twenty-four elite male athletes were assessed in the isometric bench press and a 45% 1-repetition-maximum (1RM) ballistic bench throw using a force plate and linear position transducer. The DSI was calculated using the peak force values obtained during the ballistic bench throw and isometric bench press. Athletes were then allocated into 2 groups as matched pairs based on their DSI and strength in the 1RM bench press. Over the 5 wk of training, athletes performed either high-load (80-100% 1RM) bench press or moderate-load (40-55% 1RM) ballistic bench throws. RESULTS: The DSI was sensitive to disparate training methods, with the bench-press group increasing isometric bench-press peak force (P=.035, 91% likely), and the ballistic-bench-throw group increasing bench-throw peak force to a greater extent (P≤.001, 83% likely). A significant increase (P≤.001, 93% likely) in the DSI was observed for both groups. CONCLUSIONS: The DSI can be used to guide specific training interventions and can detect training-induced changes in isometric bench-press and ballistic bench-throw peak force over periods as short as 5 wk.
Authors: Josh L Secomb; Sophia Nimphius; Oliver R L Farley; Lina E Lundgren; Tai T Tran; Jeremy M Sheppard Journal: J Sports Sci Med Date: 2015-11-24 Impact factor: 2.988
Authors: Joshua Qi Jun Tai; Shu Fen Wong; Steve Kin Ming Chow; Darine Hui Wen Choo; Hui Cheng Choo; Sofyan Sahrom; Abdul Rashid Aziz Journal: Int J Environ Res Public Health Date: 2022-05-13 Impact factor: 4.614
Authors: Robert G Lockie; Samuel J Callaghan; Matthew R Moreno; Fabrice G Risso; Tricia M Liu; Alyssa A Stage; Samantha A Birmingham-Babauta; John J Stokes; Dominic V Giuliano; Adrina Lazar; DeShaun L Davis; Ashley J Orjalo Journal: Sports (Basel) Date: 2017-06-24