Effects of Velocity Loss Threshold Within Resistance Training During Concurrent Training on Endurance and Strength Performance
in International Journal of Sports Physiology and PerformanceClick name to view affiliation
Purpose: This study analyzed the effects of 3 training interventions: 1 isolated endurance training (ET) and 2 concurrent training (CT), which differed in the velocity loss (VL) magnitude allowed during the resistance training (RT) set: 15% (VL15) versus 45%, on strength and endurance running performance. Methods: A total of 33 resistance- and endurance-trained men were randomly allocated into 3 groups: VL15, VL 45%, and ET. ET was similar across all groups. The CT groups differed in the VL allowed during the RT set. Before and after the 8-week training program the following tests were performed: (1) running sprints, (2) vertical jump, (3) progressive loading test in the squat exercise, and (4) incremental treadmill running test up to maximal oxygen uptake. Results: Significant differences (P < .001) in RT volume (approximately 401 vs 177 total repetitions for VL 45% and VL15, respectively) were observed. Significant “group” × “time” interactions were observed for vertical jump and all strength-related variables: the CT groups attained significantly greater gains than ET. Moreover, a significant “group” × “time” interaction (P = .03) was noted for velocity at maximal oxygen uptake. Although all groups showed increases in velocity at maximal oxygen uptake, the VL15 group achieved greater gains than the ET group. Conclusions: CT interventions experienced greater strength gains than the ET group. Although all groups improved their endurance performance, the VL15 intervention resulted in greater gains than the ET approach. Therefore, moderate VL thresholds in RT performed during CT could be a good strategy for concurrently maximizing strength and endurance development.
Sánchez-Moreno is with the Dept of Physical Education and Sports, Universidad de Sevilla, Seville, Spain. Rodríguez-Rosell and Pareja-Blanco are with the Dept of Sports and Computers Sciences, Universidad Pablo de Olavide, Seville, Spain. Díaz-Cueli is with the Medical Service, PFC CSKA Moscow, Moscow, Russia. González-Badillo is with the Physical Performance & Sports Research Center, Universidad Pablo de Olavide, Seville, Spain.
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