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Priming Magnitude and Retention in Highly Trained Male Volleyball Players

NCT07483931 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 14

Last updated 2026-03-19

No results posted yet for this study

Summary

This study examined whether a short, high-intensity isometric exercise can influence physical performance and muscle characteristics several hours after it is performed. Specifically, the study compared the effects of a maximal isometric conditioning activity with a typical volleyball-specific warm-up routine.

Highly trained male volleyball players participated in the study. Each participant completed two experimental conditions in a randomized crossover design: (1) a maximal isometric conditioning activity and (2) a volleyball-specific warm-up used as a control condition. The researchers evaluated changes in countermovement jump performance, muscle viscoelastic properties of the rectus femoris, and skin surface temperature over the quadriceps muscle.

Measurements were taken before the intervention and again 6 hours and 30 hours later to determine whether the conditioning activity produced delayed improvements in neuromuscular performance. Understanding these delayed effects may help coaches and athletes optimize training and competition preparation strategies.

The results of this study may provide insights into whether specific conditioning exercises can enhance or maintain explosive performance in volleyball players several hours after they are performed.

Conditions

  • Athletic Performance

Interventions

BEHAVIORAL

Isometric Conditioning Activity (ICA)

Participants performed a maximal voluntary isometric back-squat protocol consisting of 3 sets of 5 repetitions of 3-second maximal contractions at a knee joint angle of 120°. Each set was separated by 3 minutes of rest. The protocol was performed on a fixed barbell setup designed to allow maximal isometric force production.

BEHAVIORAL

Volleyball-Specific Warm-Up (Control Condition)

Participants performed a 9-minute volleyball-specific warm-up consisting of mobility exercises and plyometric drills designed to prepare athletes for explosive movements typical for volleyball.

Sponsors & Collaborators

  • The Jerzy Kukuczka Academy of Physical Education in Katowice

    lead OTHER

Principal Investigators

  • Jakub Jarosz, PhD · Academy of Physical Education in Katowice

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Model
CROSSOVER

Eligibility

Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2026-01-05
Primary Completion
2026-01-17
Completion
2026-01-17

Countries

  • Poland

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07483931 on ClinicalTrials.gov