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Taking a daily L-arginine supplement for two weeks might help young men recover faster from bike workouts by reducing a chemical in their blood that signals muscle damage.

Evidence from Studies

Supporting (0)

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No supporting evidence found

Contradicting (1)

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60

The effects of acute and chronic oral l-arginine supplementation on exercise-induced ammonia accumulation and exercise performance in healthy young men: A randomised, double-blind, cross-over, placebo-controlled trial

Randomized Controlled Trial
Human
2022 Apr

The study gave men arginine supplements and checked ammonia and exercise performance, but never looked at muscle damage markers like CK — so we can't tell if it helps reduce muscle soreness or damage after biking.

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

The effects of acute and chronic oral l-arginine supplementation on exercise-induced ammonia accumulation and exercise performance in healthy young men: A randomised, double-blind, cross-over, placebo-controlled trial

Score: 60
DOI: 10.1016/j.jesf.2022.02.003

Similar Assertions

Taking a specific amino acid supplement called L-arginine every day for three weeks might make people feel less tired when they exercise, after having a heart attack and while doing heart rehab — compared to taking a sugar pill.

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Taking a daily L-arginine supplement for two weeks doesn't help lower ammonia levels in the blood when healthy young men cycle hard, because the supplement group and the placebo group ended up with pretty much the same ammonia levels.

60
0
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Taking a daily L-arginine supplement for two weeks doesn't make healthy young men cycle any harder or faster in a short, self-paced test compared to taking a sugar pill.

60
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Taking 6 grams of L-arginine might help young men exercise harder for longer before getting tired, by about a quarter more time than usual.

39
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Taking arginine supplements for just three days won’t make you stronger or more powerful during short, intense workouts like sprinting or lifting heavy weights—even if you’re already a well-trained athlete.

46
0
76%