Cardio can be boring and tedious! It can also be ineffective! Yes! Ineffective! Why? 1. Doing too much cardio, can make you burn muscle, and in turn slow metabolism, which means the body becomes less efficient at burning fat. First of all, more is not always best. What I mean by this is that you don’t have to do hours of cardio on a treadmill in order to lose fat and get fit. Actually it’s the total opposite. You see, the body isn’t that sma...