This is a test of commonsense. Complete the next sentence:

How to do dips
Find an assisted pull-up/dip machine at the gym.
Most gyms with extensive weight sections will have this piece of equipment. It has a platform where you place your knees or feet and weights that can be adjusted to counterbalance your body weight.
Ask for assistance from a gym employee or personal trainer the first time you use this machine. If you are a first time weight lifter, assistance will reduce the likelihood of injury.