I think the fear of weights comes from bodybuilding. Lots of routines in magazines are focused on building mass. BB is a sport of asthetics.

- Good post Rocky.

I think power moves, low reps/high weight (even bodyweight) will compliment training. The problem becomes fitting all this work in your schedule whilst getting enough recovery.

There's plenty of info on plyometrics....& these exercises did/do exist in 'old' routines. Sprinting is explosive, so are burpees, so is throwing a medicine ball. It's just it all came under the heading of conditioning.

I would stay away from high rep/low weight for endurance simply because that is what you are doing when you box/spar/hit the bag/pads. I don't think you'd need an extra workout focused on that.