I've been incorporating powerlifting (weight training on certain months), plyometrics and outdoor running with my boxing training. however, i've noticed that i gas sooner than i used to since last year, and i was thinking maybe joe rogan was right about muscles affecting your cardio. since then, i've abandoned weight training and powerlifting, and i tried training strictly boxing and running only. for some reason, it even got worse, so i'm not sure if i'm either getting older, or just overtrained. i box 5 times a week, plyometrics twice a week, and run 1 mile before training, and another mile after training. i used to put powerlifting before boxing.