You are hereHome / Training / Build Muscle The 11 Undeniable Rules of Fitness The cut-and-dry way to building a better body. by Adam Griffin Return to Gallery Topics: weight gainstrength trainingweight loss Want more Men's Fitness? Sign Up for our newsletters now. more galleries Take a Trip Celebrate the 100-year-anniversary of the National Park Service. Gear Up 9 pieces of compression gear to speed muscle recovery. Mother's Day Our gift guide has options for every budget and every type of mom. Save Your Skin The 12 best summer grooming essentials for your face and body.