Vary colors for various strengths: The Yellow resistance band provides 0-10lbs resistance, Red is between 10-20 lb, Green is between 20-30lbs, blue is 30-40lbs & black provides 40-50lbs resistance. Total body workout: The resistance bands aren’t just used to mend bodies as a low-impact tool to help absolve injury or pain, they’re now thought of as an important piece of gym equipment that help build muscle mass and stamina. You can use them to add resistance to your squats, bicep curls, or lunges—all without lifting a weighted barbell or heavy plate.