Time-Course Effect of Post-Activation Performance Enhancement on Midday Peak Torque and Muscle Activation
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 13
- 试验地点
- 1
- 主要终点
- Relative Peak Torque (RPT)
研究概览
简要总结
This study investigated whether the timing of a resistance-based post-activation performance enhancement (PAPE) intervention performed during the morning influences muscle performance and muscle electrical activity during a standardized midday assessment in trained male athletes. Participants completed a control condition and three PAPE conditions performed at different times during the morning. The PAPE intervention consisted of back squat, kettlebell swing, and barbell hip thrust exercises. In all conditions, muscle performance was assessed between 12:00 and 12:15 using an isokinetic dynamometer, while surface electromyography (sEMG) of the rectus femoris muscle was recorded. The study compared relative peak torque and sEMG spectral power across the different PAPE timing conditions and the control condition.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Regularly participating in systematic sport-specific training (minimum training age of 3 years)
- •Able to comply with pre-testing restrictions (avoidance of intense physical activity for 72 hours and caffeine for 2 hours prior to testing sessions)
排除标准
- •Any musculoskeletal, orthopedic, or health condition preventing safe participation in maximal isokinetic exercise testing
- •Current or recent injury affecting lower-limb strength or performance testing
研究组 & 干预措施
PAPE T3
Participants performed the standardized PAPE intervention between 11:45 and 12:00 before the midday performance assessment. The PAPE intervention consisted of back squat, kettlebell swing, and barbell hip thrust exercises, with one set of six repetitions at 80% of the individual estimated one-repetition maximum (e1RM) for each exercise and a 1-minute rest interval between exercises. The intervention was preceded by a 5-minute cycling warm-up at 60 rpm and 5 minutes of passive rest.
干预措施: Resistance-Based PAPE Intervention (Behavioral)
Control (C)
Participants completed the standardized midday isokinetic performance assessment without a PAPE intervention. The assessment consisted of four maximal repetitions on an isokinetic dynamometer at 60°·s-¹ between 12:00 and 12:15, while rectus femoris surface electromyography was recorded.
PAPE T1
Participants performed the standardized PAPE intervention between 08:00 and 09:00 before the midday performance assessment. The PAPE intervention consisted of back squat, kettlebell swing, and barbell hip thrust exercises, with one set of six repetitions at 80% of the individual estimated one-repetition maximum (e1RM) for each exercise and a 1-minute rest interval between exercises. The intervention was preceded by a 5-minute cycling warm-up at 60 rpm and 5 minutes of passive rest.
干预措施: Resistance-Based PAPE Intervention (Behavioral)
PAPE T2
Participants performed the standardized PAPE intervention between 10:00 and 11:00 before the midday performance assessment. The PAPE intervention consisted of back squat, kettlebell swing, and barbell hip thrust exercises, with one set of six repetitions at 80% of the individual estimated one-repetition maximum (e1RM) for each exercise and a 1-minute rest interval between exercises. The intervention was preceded by a 5-minute cycling warm-up at 60 rpm and 5 minutes of passive rest.
干预措施: Resistance-Based PAPE Intervention (Behavioral)
结局指标
主要结局
Relative Peak Torque (RPT)
时间窗: Measured once per condition (control, T1, T2, T3) at a fixed assessment time (12:00-12:15 PM). PAPE was performed 3.5 hours (T1), 1.5 hours (T2), or immediately (T3) before assessment. Each condition was separated by at least 48 hours.
Relative peak torque (RPT) was determined from the highest peak torque value obtained during four maximal knee extension repetitions performed on an isokinetic dynamometer at 60°·s-¹. Peak torque was normalized to body mass and expressed as N·m·kg-¹.
Rectus Femoris sEMG Spectral Power
时间窗: Measured once per condition (control, T1, T2, T3) at a fixed assessment time (12:00-12:15 PM). PAPE was performed 3.5 hours (T1), 1.5 hours (T2), or immediately (T3) before assessment. Each condition was separated by at least 48 hours.
Surface electromyography (sEMG) of the rectus femoris muscle was recorded during the maximal isokinetic knee extension repetitions. Spectral power was calculated from the processed sEMG signal using fast Fourier transform (FFT) analysis and expressed as µV²/Hz.
次要结局
未报告次要终点