Quote Originally Posted by southpaw_outlaw
for real muscle strength without bulking up do max 5 reps of dumbells, various exercises, on very heavy weights, you should be hitting the wall at 5 max...you will develop strength without bulkin and losing handspeed..
Doing low reps, i.e. 5-8 with very heavy weights is actually a great way to bulk up, if you eat a lot of protein.

I'm a fan of weight training with boxing, some aren't though.
I've found that finding a weight where you can do about 50 - 60 reps where you are getting sore by about the 20th rep helps you to develop strength that's really usable when you're arms start to feel like led weights after 3 to 4 rounds.. I guess you could technically consider this endurance training.. maybe strength indurance? <---- if their is such thing