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

NCT07360652 | Enrolling By Invitation

• 1 other identifier: EBT_HS_04
• Study Type: interventional
• Target: 30
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Physical Performance Parameters

Outcome Measures

Primary Outcomes (1)

• 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.

  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.

Study Arms (2)

Elastic bands rewarm-up

EXPERIMENTAL

Rewarm-up with elastic bands

Other: EB RWU

CG

NO INTERVENTION

No rewarm-up

Interventions

EB RWU OTHER

Rewarm-up with elastic bands

Elastic bands rewarm-up

Eligibility Criteria

• Gender Eligibility Details: Biologically Female
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

• belong to the U-21 or Senior level of a women's volleyball club.
• be apart of a national volleyball championship

Sponsors & Collaborators

• University Institute of Maia: lead

Study Sites (1)

University of Maia

Maia, Porto District, 4475-690 Maia, Portugal

Location

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: OTHER
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: December 9, 2025
• First Posted: January 22, 2026
• Study Start: February 1, 2026
• Primary Completion: February 1, 2026
• Study Completion: February 1, 2026
• Last Updated: January 22, 2026

Record last verified: 2026-01

Locations

PT (1)