This randomized crossover study compared the acute post-activation performance responses to isometric and dynamic squat-based preconditioning protocols performed with and without electromyostimulation (EMS). Participants completed five randomized experimental conditions: maximal voluntary isometric contraction (MVIC), dynamic contraction (DC), MVIC+EMS, DC+EMS, and EMS only (O-EMS). Baseline and post-intervention assessments included countermovement jump (CMJ), countermovement jump with arm swing (CMJWH), zig-zag agility, and shooting speed, with post-tests conducted after a 4-minute recovery period. Perceptual responses, including ratings of perceived exertion (RPE), perceived discomfort (RPD), and fatigue (VAS), were recorded immediately after each protocol. All sessions were conducted between 14:00 and 16:00 under standardized conditions, with protocol order randomized and participants instructed to avoid strenuous exercise and food intake before testing.
Age range
18 Years – 25 Years
Sex
MALE
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Countermovement Jump (CMJ) Height
Timeframe: aseline and 4 minutes after each experimental condition
Countermovement Jump with Arm Swing (CMJWH) Height
Timeframe: Baseline and 4 minutes after each experimental condition
Zig-Zag Agility Performance
Timeframe: Baseline and 4 minutes after each experimental condition
Shooting Speed
Timeframe: Baseline and 4 minutes after each experimental condition