When it comes to the weight lifting world, cardio can be a very debatable topic. In this post, I am going to share my personal opinions on the ins and outs of cardio. One of the most debated questions of cardio is whether or not you should do cardio when you are trying to gain muscle and if so, when throughout the day is best to do it. I used to ask myself this same question a while ago until I finally decided to do some research on the topic for myself. From all that I have come across, it is best to separate out your cardio from your weight lifting sessions and preferably do cardio after your weight lifting sessions. This is because when you do your cardio before your training session, your body is using up energy and nutrients that could otherwise be used to build muscle.