Dips are a type of strength training exercise that require you to lift your body weight with your triceps, deltoids, pecs, and rhomboid muscles. One type you can do is a bench dip, where you support your body weight from behind. For a tricep dip, use parallel bars to lift yourself up and down. If you can't dip your full body weight yet, don't worry. Most gyms have a machine that can provide assistance for dips so you don't have to support your whole body weight. Aim to do strength training exercises like these 2-3 times a week.