While there’s no single definition of what a pre-workout supplement should contain, many include various combinations of caffeine, beta-alanine, creatine, nitrates, and branched-chain amino acids ...

Pre-workout supplements have become increasingly popular among women looking to ramp up their fitness routines. Depending on their ingredients, they can help build lean muscle, improve exercise ...

Researchers know that caffeine can improve mental processes, strength, power, and endurance during a workout. A 2016 study found that people who consumed pre-workout drinks containing caffeine saw a ...

Sarah is an experienced writer and editor enthusiastic about helping readers live their healthiest and happiest lives. Before joining Forbes Health, Sarah worked as a ...

C4 Pre-Workout is a workout supplement line from Cellucor that people may take before exercise to help increase energy, alertness, and strength. They contain caffeine and creatine, which may help ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. I first tried the ...