You’re probably used to hammering your muscles with heavy barbells, dumbbells, and machines. While those are great for your goals, you don’t always need external resistance to add size and strength to your frame — in fact, many bodyweight exercise alone can give you what you’re looking for and take a lot of stress off your body.

Still think bodyweight exercises can’t give you the size you’re looking for? Add an entirely new dimension to your workouts by using a TRX suspension trainer. You can blast the areas of your body — legs, core, arms, back, and shoulders — that you couldn’t do with traditional bodyweight staples like pushups and pullups. Also, by changing the lever angle you can instantly add resistance.