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Effects of L-Tyrosine and Caffeine on Performance in Elite Boxers

NCT07530185 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 18

Last updated 2026-04-15

No results posted yet for this study

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.

Conditions

  • Sports Performance

Interventions

DIETARY_SUPPLEMENT

Placebo

Placebo solution matched in taste and volume to active supplements.

DIETARY_SUPPLEMENT

L-Tyrosine

L-tyrosine at 150 mg/kg body weight administered 60 minutes before exercise.

DIETARY_SUPPLEMENT

Caffeine

Caffeine at 5 mg/kg body weight administered 60 minutes before exercise.

DIETARY_SUPPLEMENT

L-tyrosine + Caffeine

Combined L-tyrosine (150 mg/kg) and caffeine (5 mg/kg) administered 60 minutes before exercise.

Sponsors & Collaborators

  • Ataturk University

    collaborator OTHER

  • Inonu University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
DOUBLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2026-04-30
Primary Completion
2026-12-31
Completion
2027-03-31

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07530185 on ClinicalTrials.gov