I have to disagree on that, the physics behind a punch as a boxer is that it is as fast as possible or as hard as possible(two types of punches). Also, of course in a ring vs another boxer you would not expect a strike below waste, but your reflexes are trained anyway, and you learn avoidance techniques/movement techniques which aid you in avoiding those strikes, so in a fight anywhere else, doesn't make a lot of sense except if the you are fighting with a martial artist who only hits below the waste and knows you are a boxer so he does that. Also boxers are trained to take a lot of hits as well.
When i used to box and when i watch the boxers at our gym they just spar/box. There is no defensive training that goes on below the waist. Totally understandable as boxing is a sport where below the waist doesn't count. Unless you encounter a very street-wsie boxing trainer i can't see why any gym would teach you otherwise.
Ever watch Bushido back in the 90s? Boxers like Trevor Burbeck got slaughtered by the japanese who took their legs out. They had absolutely no defence against it.
Boxers are trained to take hits from punches with gloves on! One could argue that the semi-contact mits (like MMA ones) would hurt and damage more simply cos they are less padded. I'd rather take a shot from a 12oz glove than a MMA mit that will really hurt.
Actually i have taken from both....the 12oz really rung my bell, but the punch with the mit on hurt me to my core for days, lol....Aaah the memories.
Still stand by what i said about MA's striking (not necessarily punching) faster than a boxer though. Experienced it too many times to be persuaded otherwise i'm afraid. As kickboxer i got my ass handed to me by my friend who was a kung fu student. His rolling punch speed was phenomenal. My punches were fast but not that hard, but he dazzled me with his speed (more of a distraction strike i guess). When i converted to his style of striking i was able to beat the boxers i trained with for speed.
Want to add something else, that when you reach a certain level it does not matter what you are trained in anymore, all major martial arts have their plus or cons.
Totally agree mate.