Effects of Type and Intensity of Voluntary Contractions With Different Recovery Periods on Anaerobic Power and Maximum Torque in Young Trained Girls

Fariba Momeni Sheykheh, A. Monazzami
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Abstract

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.
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不同恢复期自发性收缩类型和强度对年轻训练女孩无氧功率和最大扭矩的影响
背景:在比赛前的热身阶段实施激活后增强现象可能比通常的热身更好。目的:因此,本研究的目的是确定不同恢复期肌肉收缩类型和强度对年轻训练女孩无氧功率和峰值扭矩的影响。方法:女性12例(年龄:22±2.95岁;高度:165.42±5.35 cm;体重:57.33±9.15 kg),连续训练2年以上。受试者进行等距收缩(3×70/7s)、同心收缩(3× 90/4)和偏心收缩(3× 110/5)或对照收缩,每次收缩间隔至少48小时。本研究分别采用反运动跳跃试验和Biodex等速装置(60°s -1)模型(ISO-1)测量无氧功率和最大峰值扭矩。数据分析采用双向重复测量方差分析和单向独立方差分析(P < 0.05)。结果:组间比较显示,同心组在立即恢复和3分钟恢复时无氧功率和峰值扭矩值最高,偏心组在7分钟恢复时最高(P < 0.05)。这些变量在同心圆收缩和偏心收缩组内比较也具有显著性(P < 0.05)。结论:偏心收缩与其他收缩类似,可产生PAP。与其他收缩相比,高强度收缩引起的偏心收缩似乎能保持PAP的一致性。
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