Muscle Strength: Tribulus terrestris extract is commonly used by athletes. A study done on 22 Australian male rugby league players, randomly placed on tribulus terrestris and placebo for 5 weeks, to evaluate tribulus terrestris extract benefits on body composition and exercise performance found that the herb may increased strength and fat free (lean) muscles.The players were also subjected to resistance training during the study and their urinary estosterone/epitestosteron (T/E) ratio was monitored as well.
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