I restarted 5 years after finishing physical therapy for surgery on a detached bicipital tendon. I couldn't use my arm for 3 years, I didn't exercise at all and my weight ballooned from that and developing a nasty sweet tooth.

Doing just cardio bores me. I've always liked weightlifting, I feel a stronger pump from it than from getting myself winded by running etc. There are also very noticeable results from lifting: barring injury, the weight I lift increases steadily, little by little. Over time I have also noticed an improvement in my physical appearance. It will take a long time to get back into decent shape, but I do at least see some progress.