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Acute L-Carnitine Supplementation Does Not Improve CrossFit® Performance: A Randomized, Double-Blind,

Asli Devrim-Lanpir1,2, Lucero Salazar Velasco3, Fanny Guadalupe Ramirez Lara3

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Acute L-carnitine tartrate supplementation did not improve CrossFit performance in recreational athletes. This study found no significant difference in repetitions completed or perceived exertion after supplementation.

Keywords:
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Area of Science:

  • Exercise Physiology
  • Nutritional Science
  • Sports Performance

Background:

  • L-carnitine supplementation is theorized to enhance exercise performance, particularly in high-intensity activities.
  • Evidence for L-carnitine's ergogenic effects remains inconclusive.
  • This study investigated L-carnitine tartrate's impact on CrossFit performance.

Purpose of the Study:

  • To determine if acute L-carnitine tartrate supplementation improves performance in a high-intensity CrossFit workout.
  • To assess secondary outcomes including perceived exertion and physiological markers.

Main Methods:

  • Randomized, double-blind, placebo-controlled crossover trial with 20 trained male recreational CrossFit athletes.
  • Participants ingested 3g L-carnitine tartrate or placebo 90 minutes before performing the

Main Results:

  • L-carnitine tartrate supplementation did not significantly alter total repetitions completed during the

Conclusions:

  • Acute 3g L-carnitine tartrate supplementation does not enhance performance in recreational CrossFit athletes.
  • Further research with larger sample sizes and diverse populations is warranted.
  • Investigating factors like sex and carbohydrate co-ingestion may clarify L-carnitine's role in exercise performance.