Weight Loss Circuit Workout What is a Weight Loss Circuit Workout? Before getting to the 10-exercise, equipment-free weight loss circuit workout, let’s take a quick look at what circuit training is. (If you already have a good idea, feel free to just scroll on down to the Weight Loss Circuit Workout heading below!) Circuit training was developed by researchers at the University of Leeds in the 1950s. James Roberts UK Fitness ProJun 25 · 11 min read