PURPOSE: The purpose of this study was to evaluate the reliability of an isometric-bench-press (IBP) test performed across 4 elbow angles and a ballistic bench throw (BBT) using a relative load, as well as evaluating the reliability of the dynamic strength index (DSI: BBT peak force/IBP peak force). METHODS: Twenty-four elite male athletes performed the IBP and a 45% 1-repetition-maximum BBT on 2 separate days with 48 h between testing occasions. Peak force, peak power, peak velocity, peak displacement, and peak rate of force development (PRFD) were assessed using a force plate and linear position transducer. Reliability was assessed by intraclass correlation (ICC), coefficient of variation (%CV) and typical error. RESULTS: Performance measures in the BBT, such as peak force, peak velocity, peak power, and peak displacement, were considered reliable (ICC = .85-.92, %CV = 1.7-3.3), while PRFD was not (ICC = .43, %CV = 4.1). Similarly, for the IBP, peak force across all angles was considered reliable (ICC = .89-.97, %CV = 1.2-1.6), while PRFD was not (ICC = .56-.65, %CV = 0.5-7.6). The DSI was also reliable (ICC = .93, %CV = 3.5). CONCLUSIONS: Performance measures such as peak force in the IBP and BBT are reliable when assessing upper-body pressing-strength qualities in elite male athletes. Furthermore, the DSI is reliable and could potentially be used to detect qualities of relative deficiency and guide specific training interventions.
PURPOSE: The purpose of this study was to evaluate the reliability of an isometric-bench-press (IBP) test performed across 4 elbow angles and a ballistic bench throw (BBT) using a relative load, as well as evaluating the reliability of the dynamic strength index (DSI: BBT peak force/IBP peak force). METHODS: Twenty-four elite male athletes performed the IBP and a 45% 1-repetition-maximum BBT on 2 separate days with 48 h between testing occasions. Peak force, peak power, peak velocity, peak displacement, and peak rate of force development (PRFD) were assessed using a force plate and linear position transducer. Reliability was assessed by intraclass correlation (ICC), coefficient of variation (%CV) and typical error. RESULTS: Performance measures in the BBT, such as peak force, peak velocity, peak power, and peak displacement, were considered reliable (ICC = .85-.92, %CV = 1.7-3.3), while PRFD was not (ICC = .43, %CV = 4.1). Similarly, for the IBP, peak force across all angles was considered reliable (ICC = .89-.97, %CV = 1.2-1.6), while PRFD was not (ICC = .56-.65, %CV = 0.5-7.6). The DSI was also reliable (ICC = .93, %CV = 3.5). CONCLUSIONS: Performance measures such as peak force in the IBP and BBT are reliable when assessing upper-body pressing-strength qualities in elite male athletes. Furthermore, the DSI is reliable and could potentially be used to detect qualities of relative deficiency and guide specific training interventions.
Authors: Vladimir Hojka; Petr Stastny; Tomas Rehak; Artur Gołas; Aleksandra Mostowik; Marek Zawart; Martin Musálek Journal: J Hum Kinet Date: 2016-09-10 Impact factor: 2.193
Authors: Justin J Merrigan; Jason D Stone; Andrew G Thompson; W Guy Hornsby; Joshua A Hagen Journal: Int J Environ Res Public Health Date: 2020-12-07 Impact factor: 3.390