Effects of caffeine on CrossFit performance
The Effect of Caffeine and Paraxantine Kinetics on Exercise Performance and Psychophysical State in Athletes After Ingestion of Mono- or Multi-ingredient Caffeine-containing Supplements
This study tests how caffeine affects CrossFit athletes' performance by comparing different caffeine supplements to a placebo to see which helps them perform better.
Quick facts
| Phase | Phase2; Phase3 |
|---|---|
| Study type | Interventional |
| Enrollment | 25 (estimated) |
| Ages | 18 Years to 40 Years |
| Sex | Male |
| Sponsor | Poznan University of Physical Education Academic / other |
| Locations | 1 site (Poznan) |
| Trial ID | NCT05516212 on ClinicalTrials.gov |
What this trial studies
This study investigates how caffeine affects performance in CrossFit athletes by measuring the kinetics of caffeine and its metabolite paraxanthine after ingestion. Participants will consume either a mono-ingredient caffeine supplement, two different multi-ingredient pre-workout supplements, or a placebo, followed by performance assessments through a specific test. Blood and saliva samples will be collected to evaluate muscle damage, recovery indicators, and psychophysiological states. The study employs a double-blind, randomized, placebo-controlled, cross-over design to ensure robust results.
Who should consider this trial
Good fit: Ideal candidates are experienced CrossFit athletes with at least 5 years of training in any sport and 2 years in high-intensity functional training.
Not a fit: Patients with current injuries, serious diseases, or health-related contraindications may not benefit from this study.
Why it matters
Potential benefit: If successful, this study could enhance athletic performance and recovery for CrossFit athletes through optimized caffeine supplementation.
How similar studies have performed: Previous studies have shown positive effects of caffeine on athletic performance, suggesting this approach is supported by existing evidence.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * written informed consent from all participants before the study, * a current medical clearance to practice sports, * training experience any sport discipline ≥ 5 years and training experience in HIFT ≥ 2 years, * performing ≥3 training units per week, * participating in CrossFit® competitions at least once a year. Exclusion Criteria: * current injury, * any health-related contraindication, * declared general feeling of being unwell, * unwilling to follow the study protocol, * serious disease or metabolic problems, * smoking and tobacco use, * presence of infectious disease in the previous 4 weeks of the study.
Where this trial is running
Poznan
- Department of Sports Dietetics, Poznan University of Physical Education — Poznan, Poland (Recruiting)
Study contacts
- Principal investigator: Paulina M Nowaczyk, PhD — Department of Sports Dietetics, Poznan University of Physical Education
- Study coordinator: Krzysztof Durkalec-Michalski, Prof., PhD
- Email: durkalec-michalski@awf.poznan.pl
- Phone: +48 (61) 835 51 65
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.