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:: FoodSmarts Ask the Nutritionist Here’s what you need to know about smart supplement use and other fitness trends from our in-house expert. BY ALEXANDRA BLACK, MPH, RD, LDN Q I want to get stronger. Should I be taking a preworkout? Perspiration Over Potions: Using supplements will never replace hard work in the gym. 12 IHRSA | www.healthclub s .com Photo: Thinkstock A: First, let’s start with what’s actually in a preworkout. Preworkout supplements are comprised of various ingredients and claim a number of benefits including increased endurance, energy, muscle strength, and fat burning. They usually contain a combination of stimulants like caffeine or guarana, creatine, antioxidants, amino acids, and other ingredients to help reduce muscle fatigue and enhance blood circulation.