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IRCT20201223049811N2 IRCT 2026-10-19 Razi University “The Effect of Beta-Alanine Supplementation on Athletic Performance in Adolescent Female Karate Athletes” Effects of Six Weeks of Beta-Alanine Supplementation on Exercise Performance and Fatigue-Related Outcomes in Competitive Adolescent Female Karate Athletes: A Randomized, Double-Blind, Placebo-Controlled Trial 2026-04-14 anticipated 30 Complete https://irct.ir/trial/93378 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Other, Purpose: Health service research, Randomization description: After eligibility screening and baseline assessment, participants were randomly allocated to the beta-alanine or placebo group using a computer-generated random-number sequence. Allocation was performed by an independent individual who was not involved in subsequent outcome assessments, Blinding description: To ensure a double-blind design and minimize bias, the beta-alanine supplement and placebo (maltodextrin) were prepared in capsules identical in appearance, size, color, texture, weight, and smell. Both supplements were packaged in identical, opaque containers. Coding and labeling of the containers (e.g., as ‘Code A’ and ‘Code B’) were conducted by an independent researcher who was not involved in participant recruitment, training supervision, or outcome assessments. Consequently, both the participants and the evaluators conducting the physical performance tests remained blind to group allocations throughout the intervention and data collection. The allocation code was concealed in a sealed envelope and remained undisclosed until all statistical analyses were completed. N/A athletes. Intervention 1: Intervention group: 6 weeks of exercise training and beta-alanine supplementation (3.2 g/day). Intervention 2: Control group: 6 weeks of exercise training and placebo (starch) supplementation. Yes - There is a plan to make this available What will be shared: The data have been coded, and the participants cannot be identified. The information will be reported anonymously in the thesis and in any article published later. When: from 2027 To whom: researcher Conditions: Only the researchers and the editor of the journal in which we intend to publish the article in the future will have access to the data. Where to obtain: Supervisor: Mohammad Azizi, faculty member at Razi University. azizimihammad@gmail.com How to obtain: The request and the reason for requesting the data will be reviewed, and the data will then be emailed as soon as possible (within 48 hours). Comments:
public Mohammad Azizi
Baghe abrisham
Kermanshah Iran (Islamic Republic of) 6714414971 +98 918 374 6103 azizimihammad@gmail.com Razi university scientific Mohammad Azizi
Baghe abrisham
Kermanshah Iran (Islamic Republic of) 6714414971 +98 918 374 6103 azizimihammad@gmail.com Razi university Iran (Islamic Republic of) Eligible participants were female karate athletes aged 15–18 years who had at least three years of continuous karate training, held a brown belt (Dan 1) or higher, and had participated in at least one provincial-level or higher competition during the previous year. n absence of acute or chronic cardiovascular, metabolic, renal, or hepatic disease; no known sensitivity to the supplement ingredients maintenance of a regular pattern of physical activity 15 years 18 years Female voluntary withdrawal consumption of less than 90% of the assigned supplement, absence from more than two scheduled training sessions, development of a supplementation-related adverse event requiring medical attention illness or injury preventing completion of the performance assessments. Treatment - Other Treatment - Other Intervention group: 6 weeks of exercise training and beta-alanine supplementation (3.2 g/day) Control group: 6 weeks of exercise training and placebo (starch) supplementation. 400-m running time. Timepoint: Before and 6 weeks after supplementation. Method of measurement: The 400-meter running time was measured and recorded in seconds using a stopwatch. Reaction time. Timepoint: before and after 6-week supplementation. Method of measurement: Reaction Time Apparatus. Razi University Approved 2025-07-02 Ethics committee of Razi University Baghe abrisham Kermanshah Kermanshah Iran (Islamic Republic of)