Habitual Caffeine Consumption and Training Status Affect the Ergogenicity of Acute Caffeine Intake on Exercise
Davar Khodadadi1, Farhad Azimi2, Abdorreza Eghbal Moghanlou3
1Faculty of Physical Education and Sports Sciences, Islamic Azad University Central Tehran Branch, Tehran, Iran.
Sports Health
|February 5, 2025
Summary
Caffeine enhances exercise performance, but habituation and training reduce its effects. Short-term caffeine withdrawal or increased dosage in trained individuals can restore performance benefits.
Area of Science:
- Exercise Physiology
- Nutritional Science
- Sports Medicine
Background:
- Caffeine is known to improve exercise performance.
- The impact of caffeine habituation and an individual's training status on its ergogenic effects remains unclear.
Purpose of the Study:
- To investigate how habitual caffeine consumption and training status influence the performance-enhancing effects of caffeine.
- To determine if caffeine withdrawal or increased dosage can overcome reduced ergogenicity.
Main Methods:
- A double-blind, placebo-controlled study involving 80 physically inactive men randomized into four groups (caffeine, caffeine+training, placebo, placebo+training).
- Participants underwent high-intensity interval training and received caffeine (3 mg/kg or 6 mg/kg) or placebo over 9 weeks.
- Performance was assessed via 3-km running and Wingate power tests at multiple time points.
Main Results:
- Caffeine (3 mg/kg) improved running time and mean power output (MPO) in all groups, with greater effects in trained individuals.
- Habitual caffeine intake reduced caffeine's ergogenic effect, an effect exacerbated by higher caffeine doses in the trained group.
- Short-term caffeine withdrawal enhanced caffeine's ergogenic effect on running performance and MPO in both trained and untrained participants.
Conclusions:
- Caffeine habituation and training status can modulate the ergogenic benefits of caffeine.
- Strategies like short-term caffeine withdrawal or increased pre-exercise caffeine dosage in trained individuals may help counteract reduced ergogenicity.
Keywords:
caffeine habituationergogenic aidexercise performancehigh-intensity interval trainingtraining statusMore Related Videos
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