Stimulant free pre-workouts are designed to increased blood flow, decrease lactic acid build up and improve mental function during training sessions.
Increase Blood Flow: The key ingredients for this are arginine, citrulline malate and their various forms. When consumed, these ingredients are converted to nitric oxide in the blood stream which has the effect of dilating blood vessels, increasing blood flow and therefore improve nutrient transportation to muscle during exercise. This has the effect of improving muscular endurance and also recovery.
Decrease Lactic Acids Build Up: The main ingredient for decreasing lactic acid build up is beta alanine. Beta alanine, asides from being a potent antioxidant, is your body's first defence against the build-up hydrogen ion during exercise. This hydrogen ion build up lower pH in muscle cells and creates the feeling of lactic acid and fatigue.
Improve Mental Function: Improve mental function with a stimulant free preworkout? Yes. Stimulants are not the only ingredients that can have noticeable positive impact on your mental function. Taurine, acetyl l-carnitine and other amino can cross the blood brain barrier, improve mood and positively impact your central nervous system.