Naturally, every athlete or bodybuilder wants to get the most out of the time spent working out. However, lots of people find it difficult to get active and stay active. That’s one of many reasons why pre-workout supplements have become so popular nowadays. It’s very tempting to take a supplement before heading out for a run or hitting the gym in the hope to improve your muscle power, endurance during exercising, and energy levels. Pre-workout supplements promise to increase your heart rate, blood flow and give you a little tingle.