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Effect of Caffeinated Chewing Gum on Vertical Jump Performance in Female Volleyball Players

NCT07240506 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 10

Last updated 2025-11-28

No results posted yet for this study

Summary

This study aimed to examine the acute effects of caffeine intake through caffeinated chewing gum on the vertical jump performance of professional female volleyball players. Ten athletes from the Turkish Women's Volleyball First League voluntarily participated in this single-blind, placebo-controlled, randomized crossover study. Each athlete completed two test sessions: one with caffeinated gum containing 200 mg of caffeine and one with a caffeine-free placebo gum. After chewing the gum for 5 minutes, participants performed three types of vertical jump tests: squat jump, countermovement jump, and block jump. The results showed that caffeinated gum significantly improved countermovement jump height compared with the placebo, while no significant differences were observed for squat or block jumps. The findings suggest that caffeine in gum form may enhance explosive performance in sports requiring rapid power output, such as volleyball.

Conditions

  • Athletic Performance

Interventions

DIETARY_SUPPLEMENT

Caffeinated chewing gum

Two pieces of caffeinated chewing gum providing 200 mg total caffeine; administered 15 minutes before performance testing.

DIETARY_SUPPLEMENT

Placebo chewing gum

Two pieces of placebo chewing gum identical in appearance and flavor to the caffeinated gum but containing no caffeine; administered 15 minutes before performance testing.

Sponsors & Collaborators

  • Muttalip Ayar

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
33 Years
Sex
FEMALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-02-10
Primary Completion
2025-02-20
Completion
2025-05-01

Countries

  • Turkey (Türkiye)

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 NCT07240506 on ClinicalTrials.gov