He's not boxing yet. If he was i'd suggest it but he isn't. He shouldn't lift anything til he gets into boxing because he'll be stiff starting and may be hard to stop being stiff for him.Yes, lift 2-3 times a week. For a boxer, you should be doing light weight, with high repetitions. Focus on your shoulders, back, chest, and most importantly, your rotator cuffs. Also, don't forget to work your legs as well. No more than 30-60 secs between lifts and make it a circuit(do a lift-60s-a different lift-60s-back to the first). Do alot of stuff with bungee's and therabands as well.:thumbsup:
Anybody, boxer or no boxer needs to train every muscle group atleast once a week whether it be high intensity or low intensity, it is imperitive to your health. Aerobic exercise needs to be accompanied by anaerobic exercise in order to be effective.You shouldn't lift weights before boxing because you'll go in there stiff. Start running.