Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Capsaicinoids, the active compounds in chili peppers, have garnered attention as potential athletic and exercise aids due to their physiological effects. Scientific interest centers on their ability to increase thermogenesis and energy expenditure, potentially supporting weight management and improved exercise performance. Capsaicinoids activate transient receptor potential vanilloid 1 (TRPV1) receptors, which can enhance sympathetic nervous system activity and increase metabolic rate. Several clinical studies have indicated modest increases in energy expenditure and fat oxidation after capsaicinoid consumption, which could theoretically benefit athletes seeking to optimize body composition or endurance.

Some research also suggests that capsaicinoids may reduce perceived exertion and pain during exercise by desensitizing pain receptors, potentially allowing for longer or more intense training sessions. However, these effects are generally small, and most studies are short-term with limited sample sizes. There is insufficient evidence to support significant improvements in athletic performance, muscle growth, or aerobic capacity. Furthermore, tolerance and gastrointestinal side effects may limit practical use.

In summary, while there is a scientific rationale and some evidence for capsaicinoids as exercise aids—mainly regarding metabolic effects and perceived exertion—the magnitude of benefit appears limited. More robust, long-term studies are needed to clarify their role in sports nutrition.

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