Document Type : Research Paper I Open Access I Released under (CC BY-NC 4.0) license
Authors
1
Assistant Professor of Exercise Physiology, Department of Physical Education and; Sport Science, Islamic Azad University, Marivan Branch, Marivan, Iran.
2
department of physical education and sport sciences, Marivan branch, Islamic Azad University, Marivan, Iran
10.22034/ren.2025.143096.1077
Abstract
Aim: The present study aimed to investigate the combined effect of citrulline, caffeine, and creatine supplementation on muscular strength and power in female athletes.
Method: In this quasi-experimental study with a randomized, crossover, double-blind, placebo-controlled design, 15 female track and field athletes working in throwing disciplines (age: 24.40±3.29, weight: 71.46±4.76, height: 172.66±4.70, BMI: 24.02±1.13) were selected to participate in the present study. The present study was conducted in seven baseline conditions, acute citrulline intake (8 g), acute creatine intake (20 g), acute caffeine intake (6 mg per kg body weight), combined citrulline and caffeine intake, combined citrulline and creatine intake, and placebo (maltodextrin). The interval between each condition was one week, and in each of the supplement and placebo conditions, 60 minutes were taken before performing the activities (RAST test, squats, and chest press). The data were analyzed using repeated measures analysis of variance.
Results: The results showed that the use of caffeine, citrulline, creatine alone and the combination of supplements (citrulline + caffeine and citrulline + creatine) significantly increased anaerobic power (peak power, average power, minimum power) and upper limb muscle strength (chest press) and lower limb muscle strength (squat) in female track and field athletes working in throwing disciplines (p<0.05). However, there was no significant difference between the combined use of supplements (citrulline + caffeine and citrulline + creatine) and the use of supplements alone in any of the measured variables (p<0.05).
Conclusion: In general, the results of the present study showed that the use of L-citrulline, caffeine, and creatine supplements alone can affect the anaerobic power and muscular strength of female track and field athletes in throwing disciplines, and the combined use of these supplements did not have an additive effect on the subjects' anaerobic power and muscular strength compared to their use alone.
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