Plus, did you know you can mix up your circuits depending on your goals? Whether you're trying to lose body fat or build muscle, there's a smart way to train. Scroll on to find out exactly how.

Circuit training workouts are a fantastic way to build muscle and lose fat – but there are some things to know about how best to do it depending on your goals.

Circuit training refers to a series of between four and ten exercises, repeated back-to-back for a set period of time. Some circuits will include breaks between exercises, some won't.