title: Beneficial Effects of Ischemic Preconditioning in Resistance Exercise Fade Over Time.
abstract: This study evaluated the effect of ischemic preconditioning (IPC) on resistance exercise performance in upper limbs. After 12-RM load determination, 21 men attended 4 trials separated by 3 days in a randomized crossover design: IPC (4×5-min occlusion 220 mmHg/reperfusion 0 mmHg) in arms and in thighs, and SHAM (equal to the IPC protocol but "occlusion" at 20 mmHg) in arms and in thighs. 8 min following the respective interventions, the subjects performed one set of resistance exercise in elbow flexion with the 12-RM load until concentric failure. The number of repetitions increased for both protocols in arm (IPC=14.1±2.5 and SHAM=14.4±3.0) and in thigh (IPC=14.3±2.2 and SHAM=13.4±1.7). However, the number of repetitions tended to decrease over the 4 trials and no more effect was found in the fourth trial. Therefore, IPC or SHAM may enhance performance in resistance exercise for upper limbs, but this effect apparently fades over time.
authors.affiliation: Department of Physiology, Institute of Biological Sciences, Federal University of Juiz de Fora, Juiz de Fora, Brazil.
authors.forename: M
authors.initials: M
authors.lastname: Marocolo
authors.affiliation: Department of Sport Sciences, Human Performance and Sport Research Group, Federal University of Triângulo Mineiro, Uberaba, Brazil.
authors.forename: I C
authors.initials: IC
authors.lastname: Marocolo
authors.affiliation: School of Physical Education and Sports, Rio de Janeiro, Federal University of Rio de Janeiro, Brazil.
authors.forename: G R
authors.initials: GR
authors.lastname: da Mota
authors.affiliation: School of Physical Education and Sports, Rio de Janeiro, Federal University of Rio de Janeiro, Brazil.
authors.forename: R
authors.initials: R
authors.lastname: Simão
authors.affiliation: Department of Rehabilitation Sciences, University Augusto Mota, Rio de Janeiro, Brazil.
authors.forename: A S
authors.initials: AS
authors.lastname: Maior
authors.affiliation: Physiology & Anatomy, German Sport University, Cologne, Germany.
authors.forename: H-J Appell
authors.initials: HJ
authors.lastname: Coriolano
mesh_terms: D000328:Adult; D054874:Athletic Performance / Q000502:physiology; D018592:Cross-Over Studies; D015444:Exercise / Q000502:physiology*; D006801:Humans; D019194:Ischemic Preconditioning / Q000379:methods*; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D055070:Resistance Training / Q000379:methods*; D013997:Time Factors; D055815:Young Adult