Pre-workout supplements may be helpful for some athletes, but they carry the risk of side effects that may affect your heart, digestion, and more.

Pre-workout supplements often contain caffeine and amino acids to boost energy before exercise. Caffeine in pre-workout can increase alertness and performance but may cause side effects if taken in ...

With hard-to-pronounce ingredients and caffeine levels that could impact your heart rate, finding a pre-workout supplements that’s both safe and effective isn’t easy. To identify the best pre-workouts ...

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If you’re training intensely and could do with a little extra energy at the gym, then a pre-workout could be for you. Consider it a bookend to a post-workout protein shake — it’s a supplement that ...

Researchers estimate that 70 % of young adults consume at least one nutritional supplement, with 30 % reporting regular use of pre-workout energy products. Modern sports science defines pre-workout ...

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