A common sensation experienced by individuals consuming pre-workout supplements is paresthesia, often described as a tingling or prickling feeling on the skin. This physiological response is primarily attributed to the presence of beta-alanine, an amino acid included in many pre-workout formulations. Beta-alanine increases muscle carnosine levels, which buffers against lactic acid build-up during exercise. This buffering action supports sustained muscular endurance. An example would be a feeling of pins and needles on the face and neck shortly after taking a pre-workout supplement.
The inclusion of beta-alanine in pre-workout supplements is driven by its potential ergogenic benefits. Increased carnosine levels in muscles can contribute to improved performance in high-intensity exercises, delaying fatigue and enhancing power output. The sensation, while harmless for most individuals, can be perceived as a sign that the supplement is working. Historically, the focus on performance enhancement has led to the widespread adoption of beta-alanine, despite the associated sensory effects.