L-Citrulline and Cycling: What a 4 km Trial Found
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A double-blind crossover trial found that trained men finished a 4 km cycling time trial faster after taking L-citrulline than after taking placebo.
How the trial worked
Each participant completed both conditions, taking L-citrulline in one period and placebo in the other. The researchers timed a short cycling effort at the end of each period.
How to read the result
The result applies to the short cycling test and the trained men studied. It does not establish the same effect in long-distance cycling, strength training, or people new to exercise.
Read the original clinical trial.