MedTrace Logo

Caffeinated Gum Use and Volleyball Performance

NCT07597265 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 11

Last updated 2026-05-19

No results posted yet for this study

Summary

This study examined the acute effects of caffeinated chewing gum on volleyball performance in trained female volleyball players. Caffeine is commonly used by athletes to improve performance, but less is known about whether caffeinated gum is useful during volleyball-specific activity.

Participants completed three testing sessions in a randomized crossover design. In one session, they chewed placebo gum. In another session, they chewed caffeinated gum containing a single 300 mg dose of caffeine. In the third session, they received the same total amount of caffeine as three separate 100 mg doses given at 30-minute intervals.

The study assessed volleyball-specific skill performance, including attack, block, and defense efficiency, during a volleyball-specific skill game. Vertical jump height, heart rate, perceived exertion, side effects, and condition guessing were also recorded.

Conditions

  • Volleyball Players
  • Performance

Interventions

DIETARY_SUPPLEMENT

Placebo gum

Participants chewed caffeine-free placebo gum for 5 minutes. The placebo gum was selected to be similar in shape and color to the caffeinated gum.

DIETARY_SUPPLEMENT

Partial-dose caffeinated gum

Participants received three separate pieces of caffeinated gum containing 100 mg caffeine per piece. One piece was chewed for 5 minutes at each administration time point, with doses given at 30-minute intervals, providing a total dose of 300 mg caffeine.

DIETARY_SUPPLEMENT

Single-dose caffeinated gum

Participants chewed three pieces of caffeinated gum containing 100 mg caffeine per piece, providing a total dose of 300 mg caffeine. The gum was chewed for 5 minutes and then discarded.

Sponsors & Collaborators

  • Ege University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
DOUBLE
Model
CROSSOVER

Eligibility

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

Timeline & Regulatory

Start
2025-08-05
Primary Completion
2026-04-23
Completion
2026-04-23

Countries

  • Turkey (Türkiye)

Study Locations

More Related Trials

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 NCT07597265 on ClinicalTrials.gov