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Effects of L-Tyrosine and Caffeine on Performance in Elite Boxers
Sponsor: Inonu University
Summary
Participants will complete five sessions, including one familiarization and baseline session and four experimental conditions (placebo, L-tyrosine, caffeine, and combined supplementation). The baseline session will include resting measurements. The experimental conditions will be performed in a randomized, counterbalanced crossover design with a washout period of at least 72 hours between sessions.
Official title: Effects of L-Tyrosine and Caffeine Supplementation on Cognitive, Physical, and Physiological Parameters in Elite Boxers: A Randomized Double-Blind Placebo-Controlled Crossover Study
Key Details
Gender
MALE
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
18
Start Date
2026-04
Completion Date
2027-03
Last Updated
2026-04-15
Healthy Volunteers
Yes
Conditions
Interventions
Placebo
Placebo solution matched in taste and volume to active supplements.
L-Tyrosine
L-tyrosine at 150 mg/kg body weight administered 60 minutes before exercise.
Caffeine
Caffeine at 5 mg/kg body weight administered 60 minutes before exercise.
L-tyrosine + Caffeine
Combined L-tyrosine (150 mg/kg) and caffeine (5 mg/kg) administered 60 minutes before exercise.
Locations (1)
Ataturk University Faculty of Sport Sciences
Erzurum, Turkey (Türkiye)