Optimization of the Force–Velocity Relationship Obtained From the Bench-Press-Throw Exercise: An a Posteriori Multicenter Reliability Study
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Purpose: An a posteriori multicenter reliability study was conducted to compare the reliability of the outcomes derived from the linear force–velocity (F–V) relationship (F-intercept [F0], V-intercept [V0], F–V slope, and maximum power [Pmax]) using a 2-point method based on 2 distant loads with respect to a multiple-point method based on 4 proximal loads and a multiple-point method that considered all 6 tested loads. Method: Data from 63 healthy men derived from 3 studies were analyzed. The F–V relationship obtained from the bench-press-throw exercise was determined in 2 separate sessions using 3 different combinations of loads: 2-point method (20–70% of 1-repetition maximum [1RM]), 4-load multiple-point method (30–40–50–60% of 1RM), and 6-load multiple-point method (20–30–40–50–60–70% of 1RM). Reliability was assessed through the coefficient of variation (CV), whereas a CVratio of 1.15 was deemed as the smallest important ratio. Results: The 2-point method provided the outcomes of the F–V relationship with greater reliability than the 4-load multiple-point method (F0, 3.58% vs 4.53%, CVratio = 1.27; V0, 5.58% vs 7.85%, CVratio = 1.41; F–V slope, 8.57% vs 11.99%, CVratio = 1.40; Pmax, 4.33% vs 4.81%, CVratio = 1.11). The reliability of the 6-load multiple-point method was comparable to the 2-point method (F0, 3.53%, CVratio = 1.01; V0, 5.32%, CVratio = 1.05; F–V slope, 8.38%, CVratio = 1.02; P0, 3.74%, CVratio = 1.16). Conclusion:The distance between experimental points is more important for obtaining a reproducible F–V relationship than the number of experimental points; therefore, the 2-point method could be recommended for a quicker assessment of the F–V relationship.
García-Ramos is with the Dept of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain, and the Dept of Sports Sciences and Physical Conditioning, Faculty of Education, CIEDE, Catholic University of the Most Holy Conception, Concepción, Chile. Jaric is with the Biomechanics and Movement Science Graduate Program, Dept of Kinesiology and Applied Physiology, University of Delaware, Newark, DE; Faculty of Sport and Physical Education, University of Belgrade, Belgrade, Serbia; and Dept of Human Motor Behavior, Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland.
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