Caffeine & Bodybuilding Dehydration Ability

Not Applicable

Completed

• Conditions: Caffeine; Placebo
• Interventions: Dietary Supplement: caffeine

• Registration Number: NCT06431035
• Lead Sponsor: Chih-Hui Chiu

Brief Summary

15-20 trained bodybuilding athletes were divided into caffeine gum trial (CAF) and placebo trial (PL) with a randomized, double-blind study design. The participants chewing either caffeine Gum (CAF trial, containing 5 mg/kg of caffeine) or placebo gum (PL) for 10 minutes. After rested for 15 minutes, Participants used the bicycle to adjust the pedal resistance and speed according to their own feelings until they were dehydrated to 2% of their original body weight.

Detailed Description

The purpose of this study was to investigate the effect of caffeinated chewing gum on dehydration ability in bodybuilding athletes. Methods: 15-20 trained bodybuilding athletes were divided into caffeine gum trial (CAF) and placebo trial (PL) with a randomized, double-blind study design. The participants chewing either caffeine Gum (CAF trial, containing 5 mg/kg of caffeine) or placebo gum (PL) for 10 minutes. After rested for 15 minutes, Participants used the bicycle to adjust the pedal resistance and speed according to their own feelings until they were dehydrated to 2% of their original body weight. Record time from exercise to completion of dehydration, heart rate, HRV, energy expenditure, fat oxidation rate and carbohydrate oxidation rate.

Study Timeline

• Study Start: 2024-04-08
• Study First Submitted: 2024-04-08
• Study First Submitted QC: 2024-05-24
• Study First Posted: 2024-05-28
• Primary Completion: 2024-06-30
• Study Completion: 2024-06-30
• Status Verified: 2024-07
• Last Update Submitted: 2024-07-23
• Last Update Posted: 2024-07-24

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 14

Inclusion Criteria

• having won the top 8 places in a national competition,
• having no cardiovascular or joint diseases
• being an adult male

Exclusion Criteria

• no top 8 finishes at national level
• cardiovascular or joint disease, or any other condition that could be impaired by exercise
• female and underage participants
• previous caffeine allergy

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
placebo	caffeine	Chewing placebo gum (without caffeine) for 10 minutes before test.
caffeine gum	caffeine	Chewing caffeine Gum (CAF trial, containing 5 mg/kg of caffeine) for 10 minutes before test.

Primary Outcome Measures

Name	Time	Method
dehydration speed	15 minutes after intervention	The participants start dehydration until dehydrated to 2% of their original body weight.

Secondary Outcome Measures

Name	Time	Method
energy expenditure	15 minutes after intervention	The energy expenditure during dehydration

Trial Locations

Locations (1)

National Taiwan University of Sport; 🇨🇳 Taichung, Taiwan