IRCT20170326033146N4 IRCT 2021-03-13 Razi University The effect of citrulline-malate on maximal strength and anaerobic power effect of citrulline-malate supplement on maximal strength and anaerobic power of middle aged male tennis players 2021-04-04 anticipated 16 Complete https://irct.ir/trial/54773 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Crossover, Purpose: Prevention, Randomization description: Permuted block randomization; allocation of subjects will be performed using permuted block randomization with four blocks of four (two for experimental and two for the control group in each block) until reaching two equal groups of 8 in each. To do this, random sequencing software is used, and random allocation software is used, and others other than researchers in the implementation of interventions and measurements in the event of a trial, Blinding description: In this study, supplementation is done in a double-blind setup. This means that neither the subject nor the researcher knows that the subjects have taken a supplement or placebo. 3 The subject of study is not disease.. Intervention 1: Intervention group: Citrulline malate supplement will be consumed as a drink, including 200 ml of water, eight grams of citrulline malate, 20 ml of lemon juice, and 10 grams of sugar one hour before the training tests. Intervention 2: Control group: The control group (placebo) will take maltodextrin. No - There is not a plan to make this available Justification or reason for not sharing IPD is no more information.