“Circuits. One mistake that people make is to do multiple sets of the same exercise without rest between the sets. This doesn’t allow your muscles to recover and it’s a waste of your workout. But instead of doing a set, resting, and then doing your second set, it’s more effective to move on to multiple exercises in a circuit, so that you don’t rest between exercises but do rest each muscle group. This will give you a good cardio workout while you do your strength training.”