Doing cardiovascular exercises on a regular basis is important. It helps get your heart rate up and aids in burning fat.

But if your workouts focus mostly on cardiovascular exercises, it could be the reason why you are not building muscels. Cardio exercises tend to put your body in a deficit, which is not great for building muscle mass.

Overdoing cardio exercises like running, spin classes or swimming means you end up burning hard-earned muscle tissue along with fat.