Open AccessEffects of Type and Intensity of Voluntary Contractions With Different Recovery Periods on Anaerobic Power and Maximum Torque in Young Trained Girls
Author(s) -
Fariba Momeni Sheykheh,
Amirabbas Monazzami
Publication year - 2020
Publication title -
journal of archives in military medicine
Language(s) - English
Resource type - Journals
eISSN - 2345-5063
pISSN - 2345-5071
DOI - 10.5812/jamm.109872
Subject(s) - concentric , eccentric , anaerobic exercise , isometric exercise , mathematics , analysis of variance , torque , repeated measures design , vertical jump , contraction (grammar) , jump , zoology , medicine , physical therapy , statistics , physics , biology , geometry , quantum mechanics , thermodynamics
Background: Implementing the post-activation potentiation phenomenon before a competition in the warm-up section may be better than performing the usual warm-up. Objectives: Therefore, the purpose of this study was to determine the effects of type and intensity of muscle contraction with different recovery periods on anaerobic power and peak torque in young trained girls. Methods: Twelve female subjects (age: 22 ± 2.95 years; height: 165.42 ± 5.35 cm; weight: 57.33 ± 9.15 kg) who had at least two years of continuous training experience were randomly selected. The subjects performed the contraction protocols (isometric (3×70/7s), concentric (3 × 90/4), and eccentric (3 × 110/5)) or control conditions in eight sessions with at least 48 hours intervals between the sessions. In this study, the countermovement jump test and Biodex isokinetic device (60°.S-1) model (ISO-1) were used for measuring anaerobic power and maximum peak torque, respectively. Two-way repeated-measures ANOVA and one-way independent ANOVA were used for analyzing the data (P < 0.05). Results: The between-group comparisons showed that the highest anaerobic power and peak torque values in immediate and three-minute recovery periods were seen in the concentric protocol, and the highest values in seven-minute recovery periods were seen in the eccentric protocol (P < 0.05). These variables were also significant in concentric and eccentric contractions in within-group comparisons (P < 0.05). Conclusions: Eccentric contraction, similar to other contractions, can produce PAP. It seems that eccentric contractions due to a higher intensity of contractions can maintain more consistency of PAP than do other contractions.