Effects of an Elastic Band Rewarm-Up in Highly Trained Female Volleyball Players

N/AEnrolling By InvitationNCT07360652

University Institute of Maia30 enrolled

Overview

This study aims to examine the acute effects of an elastic band rewarm-up on vertical jump performance in highly trained female volleyball players. A randomized crossover design will be used, with participants completing three sessions. Session 1 will serve as a familiarization with the testing and the rewarm-up protocol. In Sessions 2 and 3, participants will be divided into two groups. Group 1 will perform a standard warm-up followed by 5 minutes of rest, then an elastic band rewarm-up, while Group 2 will perform the warm-up followed by 5 minutes of rest only. In the subsequent session, the protocols will be crossed over so that each participant completes both conditions. Vertical jump performance will be assessed using the Chronojump system, evaluating both countermovement jumps (CMJ) and Abalakov jumps. To mimic real-game conditions, athletes will rotate between the vertical jump evaluations and simulated match play, allowing investigation of the acute effects of an elastic band rewarm-up on explosive lower-limb performance during volleyball-specific activity.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

OTHER

Masking

NONE

Enrollment

Conditions

Physical Performance Parameters

Interventions

Outcomes

Primary Outcomes

Vertical Jump

Jump height and power will be evaluated using Chronojump system, evaluating both countermovement jumps (CMJ) and Abalakov jumps. The players will perform the CMJ, where they will begin from an upright position, with their hands on their hips; a rapid downward movement to a knee angle of ∼90°, immediately transitioning to propel themselves upwards into the air. The abalakov jump is similar to the CMJ; the only difference is that the hands can move freely while jumping.

Time frame: The evaluations will be conducted at baseline (before the warm-up), immediately after the warm-up intervention, after the 5 minute rest, and after 4 minutes, 8 minutes and 12 minutes of the simulated match.