How Long Does Pre-Workout Last?
Most pre-workout supplements last about 60 to 90 minutes after ingestion. That means you will notice diminishing performance about an hour and a half after taking pre-workout.
However, the duration for which you see results also depends on the ingredients and the dosage. So it’s important to know what’s in your pre-workout to understand better how long it lasts.
What’s In Pre-Workout?
While formulations vary between brands, a few key ingredients are found in nearly all pre-workout supplements. These ingredients are caffeine, l-arginine, and, beta-alanine.
Caffeine is a stimulant that works by inhibiting the degradation of intracellular cyclic AMP (cAMP) and delaying fatigue. In other words, it doesn’t really give you energy, but it does make you feel less tired.
Moreover, caffeine is helpful during a workout because it can improve your stamina1. In addition, studies suggest that caffeine positively affects your metabolic rate, which can promote fat loss2.
The amount of caffeine in a pre-workout supplement can range from 100 to 300mg. By comparison, an average cup of coffee contains about 150mg of caffeine.
Related: Does The Caffeine In Pre-Workout Cause Acne?