Isometric vs. Dynamic Squat Pre-Loading: Acute PAPE Responses

Starting soon · Not applicable

Conditions studied: Soccer, Performance, Contraction

In brief

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.

Key facts

Study ID

NCT07696026

Run by

Karabuk University

People needed

22

Starts

2026-08-01

Expected to finish

2026-09-05

Last updated by the study team

2026-07-10

Who can join

Age: 18 and older, up to 25. Sex: male. Healthy volunteers: accepted.

You may qualify if…

• Being healthy
• Male volleyball athletes
• Willing to maintain the intervention for all sessions

You may not qualify if…

• Being under 18 years old
• Having a chronic disease
• Contraindications for exercise

Where it is running

• Karabuk University — Karabük, Turkey, Turkey (Türkiye)

Full record on ClinicalTrials.gov

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