When it comes to aerobics, can you have too much of a good thing? The Aerobics Channel reveals the 7 warning signs of overdoing your cardio workouts. If you don’t pay attention, you’ll risk burnout, injury and other serious symptoms. It’s tricky to know when to rest - luckily your body is your guru and will give you these 7 overtraining signs. We also tell you the intensity, duration and frequency of aerobic sessions you should be doing each week to help you consider whether to pull it back.