The main purpose of working out is to better one's physical health and this is my priority in exercising, however I very much enjoy pushing myself to the extreme. This means either lifting heavy or running far/fast most days of the week. I enjoy hitting new prs and this drives a different sort of motivation for me to exercise, but how exactly should I balance all of this to be most effective? I have been asking myself this question for a long time now and have a hard time coming up with a solid answer. Coming from a cardio heavy background of track/cross country/soccer, I feel naturally inclined to pursue more of running, but in developing a passion for lifting weights in recent years it becomes difficult to figure out the marginal benefit of one versus the other. This is my weekly schedule right now: Monday: 3-4 mile run Tuesday: Upper body lift (li...