Changes in the Force-Velocity Mechanical Profile After Short Resistance Training Programs Differing in Set Configurations

J Appl Biomech. 2017 Apr;33(2):144-152. doi: 10.1123/jab.2016-0181. Epub 2016 Dec 5.


The main aim of this study was to analyze the effect of resistance training programs differing in set configuration on mechanical force-velocity profiles. Thirteen participants performed 10 unilateral knee extension training sessions over 5 weeks. Each limb was randomized to one of the following set configurations: traditional (4 sets of 8 repetitions at maximum intended velocity, 10RM load, 3-min pause between sets) or interrepetition rest (32 maximum intended velocity repetitions, 10RM load, 17.4 s of rest between each repetition). Velocity of each repetition was recorded throughout the program. Before and after training, individual linear force velocities were calculated, and the following parameters were obtained: force and velocity axis intercept, slope, and estimated maximum power. Mean velocity was higher throughout the program for interrepetition rest configuration (0.54 ± 0.01 vs. 0.48 ± 0.01 m∙s-1 for interrepetition rest, and traditional configuration respectively; main effect of set configuration: P < .001). There was a significant increase in force and velocity intercepts, but a steeper negative slope after both training protocols (main effect of time: P < .001 for every variable). Differences in resistance training velocity did not affect the adaptations. Our results suggest that, in a short-term program, maximum intended rather than actual velocity is a key factor to modulate strength adaptations.

Keywords: kinetics; knee extension; power output; strength.

MeSH terms

  • Adaptation, Physiological / physiology*
  • Female
  • Humans
  • Knee Joint / physiology
  • Male
  • Movement / physiology*
  • Muscle Contraction / physiology*
  • Muscle, Skeletal / physiology*
  • Physical Fitness / physiology*
  • Resistance Training / methods*
  • Young Adult