@article{uneatlantico40,
          number = {7},
            year = {2020},
         journal = {International Journal of Sports Physiology and Performance},
           title = {Jump-Rope Training: Improved 3-km Time-Trial Performance in Endurance Runners via Enhanced Lower-Limb Reactivity and Foot-Arch Stiffness},
           month = {Marzo},
          volume = {15},
          author = {Felipe Garc{\'i}a-Pinillos and Carlos Lago-Fuentes and Pedro A. Latorre-Rom{\'a}n and Antonio Pantoja-Vallejo and Rodrigo Ramirez-Campillo},
           pages = {927--933},
        keywords = {Plyometric exercises; Resistance training; Rope jumping; Running; Stretch reflex.},
             url = {http://repositorio.uneatlantico.es/id/eprint/40/},
        abstract = {Context: Plyometric training promotes a highly effective neuromuscular stimulus to improve running performance. Jumping rope (JR) involves mainly foot muscles and joints, due to the quick rebounds, and it might be considered a type of plyometric training for improving power and stiffness, some of the key factors for endurance-running performance. Purpose: To determine the effectiveness of JR during the warm-up routine of amateur endurance runners on jumping performance, reactivity, arch stiffness, and 3-km time-trial performance. Methods: Athletes were randomly assigned to an experimental (n = 51) or control (n = 45) group. Those from the control group were asked to maintain their training routines, while athletes from the experimental group had to modify their warm-up routines, including JR (2?4 sessions/wk, with a total time of 10?20 min/wk) for 10 weeks. Physical tests were performed before (pretest) and after (posttest) the intervention period and included jumping performance (countermovement-jump, squat-jump, and drop-jump tests), foot-arch stiffness, and 3-km time-trial performance. Reactive strength index (RSI) was calculated from a 30-cm drop jump. Results: The 2 {$\times$} 2 analysis of variance showed significant pre?post differences in all dependent variables (P {\ensuremath{<}} .001) for the experimental group. No significant changes were reported in the control group (all P ? .05). Pearson correlation analysis revealed a significant relationship between {\ensuremath{\Delta}}3-km time trial and {\ensuremath{\Delta}}RSI (r = ?.481; P {\ensuremath{<}} .001) and {\ensuremath{\Delta}}Stiffness (r = ?.336; P {\ensuremath{<}} .01). The linear-regression analysis showed that {\ensuremath{\Delta}}3-km time trial was associated with {\ensuremath{\Delta}}RSI and {\ensuremath{\Delta}}Stiffness (R2 = .394; P {\ensuremath{<}} .001). Conclusions: Compared with a control warm-up routine prior to endurance-running training, 10 weeks (2?4 times/wk) of JR training, in place of 5 minutes of regular warm-up activities, was effective in improving 3-km time-trial performance, jumping ability, RSI, and arch stiffness in amateur endurance runners. Improvements in RSI and arch stiffness were associated with improvements in 3-km time-trial performance.}
}