Effects of L-Tyrosine and Caffeine on Performance in Elite Boxers
Starting soon · Not applicable · Has a placebo group
Conditions studied: Sports Performance
In brief
Participants will complete six sessions, including one familiarization and baseline session followed by five experimental conditions: control (no supplementation), placebo, L-tyrosine, caffeine, and combined L-tyrosine plus caffeine. The experimental conditions will be performed in a randomized, counterbalanced crossover design with a washout period of at least 72 hours between sessions. Resting physiological and cognitive assessments will be performed during the familiarization session, while biochemical, cognitive, and boxing-specific performance assessments will be conducted before and after each experimental session.
Key facts
- Study ID
- NCT07530185
- Run by
- Inonu University
- People needed
- 18
- Starts
- 2026-09-01
- Expected to finish
- 2027-03-01
- Last updated by the study team
- 2026-07-08
Who can join
Age: 18 and older. Sex: male. Healthy volunteers: accepted.
You may qualify if…
- Male elite boxers aged ≥18 years At least 8 years of boxing training experience Active participation in national or international competitions Regular training schedule No injury or illness affecting performance
You may not qualify if…
- Use of nutritional supplements or stimulants within the last 4 weeks Any cardiovascular, metabolic, or neurological disorder Current injury or musculoskeletal limitation Smoking or excessive caffeine intake Failure to comply with study procedures
Where it is running
- Ataturk University Faculty of Sport Sciences — Erzurum, Turkey (Türkiye)
Full record on ClinicalTrials.gov
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