l-Citrulline Supports Vascular and Muscular Benefits of Exercise Training in Older Adults
Figueroa, Arturo Exercise and Sport Sciences Reviews: July 2020 - Volume 48 - Issue 3 - p 133-139
In Brief
Age-associated reduction in endothelial nitric oxide (NO) synthesis contributes to the development of cardiovascular diseases and sarcopenia.
l-Citrulline is a precursor of NO with the ability to improve vascular function and muscle protein synthesis. We hypothesize that vascular and muscular benefits associated with oral l-citrulline supplementation might be augmented by concomitant supplementation with exercise training in older adults.
Key Points
Aging is associated with hypertension and reduced muscle mass and strength (quality) that may be mediated by impaired nitric oxide bioavailability.
Oral l-citrulline increases plasma l-arginine and nitric oxide production.
l-Citrulline supplementation improves muscle protein synthesis, muscle mass, and oxygen delivery that may benefit exercise performance.
Combined with exercise training, l-citrulline may benefit vascular and muscular function via improvements in nitric oxide bioavailability and muscle protein synthesis in older adults.