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Caffeinated Gum Use and Volleyball Performance
Sponsor: Ege University
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.
Official title: Acute Effects of Caffeinated Gum Use on Volleyball Performance: A Randomized, Placebo-Controlled Crossover Trial
Key Details
Gender
FEMALE
Age Range
18 Years - 35 Years
Study Type
INTERVENTIONAL
Enrollment
11
Start Date
2025-08-05
Completion Date
2026-04-23
Last Updated
2026-05-19
Healthy Volunteers
Yes
Conditions
Interventions
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.
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.
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.
Locations (1)
Ege University, Faculty of Sport Sciences
Izmir, Bornova, Turkey (Türkiye)