Just what exactly determines punching power? I know that weight does influence it, perhaps significantly, but it doesn't tell the whole story. Many say that Earnie Shavers was the hardest one punch heavyweight hitter ever. But at 6' 210 lbs, he was hardly the largest puncher. In fact, Lennox Lewis at 245 lbs in his prime was 35 lbs larger than Shavers. Marciano is another example. He hit harder than many 200+ pound heavies. Even when compared with 200+ lbs heavyweights who fought in the era of 180ish lbs heavyweights were not known as harder punchers than Marciano even in those days. Muhammad Ali was a great fighter, but not a great puncher. I don't think anyone would dispute that Floyd Patterson or Jersey Joe Walcott hit harder. And George Foreman, who in his prime was 6'3 220- 225 lbs and would be an average sized heavyweight today, to me, seem to me to hit harder than say, Anthony Joshua and I say that because I can't see Wladimir Klitchsko having lasted 11 rounds taking clean punches from a 1974 George Foreman like he did from AJ. Yet, AJ is about 20- 25 lbs heavier and in muscular weight as well. But on the other hand, we know that size is a significant factor, because while say, Sugar Ray Robinson pound for pound may have been a harder puncher than a 210 lbs prime Ali, odds are, if you tested their power in a lab, Ali's shots would have more absolute power. And if you put Ali against welterweights and middleweights, Ali would look like George Foreman. Is there a medical or scientific explanation for this? Also, some say that old time power punchers like Joe Louis, Jack Dempsey or Rocky Marciano couldn't hurt modern day heavies. I disagree with that. Consider this: All 3 were known as harder punchers than say Ali or Holmes. But no one says Holmes or Ali couldn't hurt modern day heavies. In the 2nd Ali/Patterson fight, Ali enjoyed a 30 lbs weight advantage over the 188 lbs Patterson. He planted himself and punched Patterson with clean punches, going for the KO, but Patterson still stood up under them. I can't imagine Patterson having Louis, Marciano or Dempsey teeing off on Patterson without with clean punches and Patterson not being flat on his back. But, add 30 or 40 lbs of solid muscle and make Patterson the size of a modern day heavyweight and Ali could put him down for a 10 count, but Louis best right hand would now bounce off his chin? That doesn't make sense.
Plenty of people say Ali or Holmes couldn't hurt a modern shw, although you're right, there is a bit of a disconnect imo with fighter pre ali, which I think is probably largely but not exclusively a form of recency bias. Also, Shavers ko percentage went down alot the heavier his opponents were. So did Foreman's.
Grip, speed, timing of the shot/placement, and weight transfer. If you have more mass your grip is usually tighter adding to the power and you have more weight which can add to the weight transfer. Weight transfer deals with technique. Shots you don't see coming are much effective than the punches you see because your body just doesn't know it is about to get hit. The speed and mass is just basic physics. Anyone that says older heavyweights couldn't hurt modern heavyweights are silly. The thing is, the human body is basically a glass cannon. Sure, your weight helps absorb/deal with the force of a blow but if you get caught flush by any grown man weighing over 175 and they put everything into that shot you are simply going to be out regardless of how much you weigh. People also say there are also basically two types of power as far as boxing. Thudding and snapping. The snapping is more of those quick shots that instantly drop a guy. Usually that has to do with counters you just didn't see coming. Prime Pacquiao is a good modern example of that. A lot of times they are less dangerous as the fight goes on because you adjust to that speed (and sometimes they slow down themselves) making them a little less effective. These punches also seem to put you out a little bit differently. You're just unconscious. The thudding is more like Golovkin for a modern example. This power is more like... I don't know, a bat? This one is sheer force (Foreman is probably the epitome of this) and this type of power never goes away and it doesn't matter if you see these punches coming or not. Usually for these your body just breaks down from getting hit repeatedly and you can't continue. You can have a mixture of the two, but generally you lean in one directions.
Weight is certainly a factor it compliments leverages. Bench press is NOT a direct indicator of punching power but it is most effected by weight gain more than any other lift. Some elite benchers literally put on 100lbs+ much of it being fat and their benches sky rocket, of course then end up competing in the heaviest weight class.
Bench press does nothing for your punching power. If you want to lift weights to gain power do kettlebell exercises. It improves your grip. Bench presses are useless for that.
I did say it is not an indicator of punching power only that it is effected directly by weight gain as is punching power. The additional body weight seems to compliment/enhance ones natural leverages.
Punching power is dictated mainly by technique. Things that help are hand strength, shoulder strength, and upper back/core strength. When people say legs they mean technique. Having big legs won't make you a big puncher.
Weight on your punches, speed, precission and a gift from god. You need all those 4 things (the 4 of them, no exceptions) to have top notch ko power.
if you weigh a few stone less than your sparring partner, you could be Ko'd at anytime. so take your time and leanr.
I've looked into this subject a lot. It seems to me that most of the post in this thread do have some truth to them. That's what makes punching power such an incredibly interesting subject. There is not any one thing that you can measure to determine it. There are many, many factors that lead to whether or not your opponent is rendered unconscious.
It's mainly technique. The shoulder snap is the main "lever". Meaning it can increase your power more than any other attribute. Size is a given advantage, you don't need to learn it, or to be talented to have it. So it's a more accessible way for the masses to increase power. But not as effective as the technique-driven shoulder snap. Guys like Marciano, Dempsey, and Louis were unicorns, and were probably the best punchers of all time. Dempsey sparred an amateur 7ft fighter in the gym, KO'd and dislocated his jaw with the first punch.
One thing that has not been mentioned that I feel plays somewhat of a roll in this is wrist circumference. That and hand size. If you have 8 inch wrists and hands the size of a natural cruiserweight, you are going to be quite a thudder if you fight at 160, for example.
You can't do any exercises to gain power You've either got it or you don't see small skinny guys who can crack and big dudes you can't even throw a punch... 1. Mass 2. Genetics - Muscle fibers, limb lengths & ratios, body size (linked to mass) 3. Technique It becomes special when you have a fighter with speed and power. Imagine if Fury had power? he'd be unstoppable...but you cannot have gifts in all areas. He loses power for gifts in almost all other areas. It's actually a decent trade off.
A simple way to think of punching power is how much the puncher's hand decelerates when it hits the target. The less the hand slows down, the more power. If you hit someone in the head with a hammer, it is barely going to slow down at all. If you hit then with a pillow, it's going to slow down almost completely at the point of contact. The same principle applies with hitting a baseball.