Hammer Nutrition is a supplement sponsor for Western Reserve Racing endurance events. Perform your best – make Hammer’s natural products, free of added sugars, artificial colors, flavors, chemicals, and preservatives – part of your smart fueling strategy. Hammer Nutrition Training Tip #4: Pre-Exercise Fueling BEFORE WORKOUTS AND RACES, CONSUME 300-400 CALORIES. COMPLETE YOUR MEAL 3 HOURS..