I haven't seen much evidence that punch resistance improves between the 210 and 250 pound range. The main advantage of being heavier is being heavier. Yes, that counts a lot on the inside, in clinches, and any time fights become a little stalled and "flat-footed". A fighter can feel another fighter's weight often.
Generally the bigger the better, provided the athleticism stays the same. In reality of course truly large fighters with top flight athleticism tend to be incredibly rare so there's usually a trade off. Prior to the nineties it was almost always the case that the fastest and most technically sound fighters were those on the mid to lower end of the spectrum in terms of size. The giants had the power and the reach, but usually lacked for speed or coordination which made them beatable by their smaller brethren. They also tended to have problems with mobility and stamina, and in some cases even punch resistance. Even today the truly large men in the division still lack a little in these attributes. Outside of Klitschko Joshua is about as technical a big man as you can get, but he has clear deficiencies in his mobility and ability to recover from shots. Fury has problems with punch resistance and generally lacks the power you'd expect of a man of his size. Parker's probably about the best big man in the division in terms of speed, technique, and punching power, but he's still got a long way to go in terms of development. He's also got a very short reach for his height which affects his style and ability to fight as a larger heavyweight. Ultimately I think the six foot three to six foot five range gives fighters the best possibility of having the size and strength to compete and still retain the athleticism necessary to trump anyone in the division.
That's about the range I'd say, 6'3 220. gives you the size for bigger men and still control quicker heavys.
There is a 15-pound jump from the middle ( 160 ) to light heavyweight and another 16-pound jump from light heavyweight ( 175 ) to heavyweight ( 201 ). 31 total pounds. Few would expect a skilled middleweight to beat a man that is skilled at 200 pounds. It has happened, but its rare and the smaller man needs all-time power and skills, combined with the heights being close to even. These days the best amateurs and pros all seem to be on average about 6'5" tall and 240 pounds. This is a 40-pound jump, or if you will 2.5 weight classes above yesteryears heavyweights. So minimum today is about 220 pounds for weight. You won't find any contenders today under this weight and through the past 15 years its rare to see one man under 220 pounds in the top ten. The ideal height and weight depend, but if you were to take the average of those in the top 5 today it would be about 6'5" tall, 240 pounds. While some will quickly point out that Willard and Carrera were also this size, my counterpoint is there was only one man this size per decade with enough overall ability to rate highly. Today 6'5" tall 240 pounds is pretty common. All four of the medalists in the 2016 Olympics have either gone ( Yoka ) or have announced their intentions ( Hrgovic, Joyce, and Dychko ) to turn professional. Yes, they all fit the new 6'5" 240-pound mold.
I think the historical size for HW ranging from 6'- 6' 3" weighing 195 - 210/15 lean & fit. That's HW. anything above 6'3 and more than 225lbs is S-HW.
Yeah when it comes to mobility smaller is better. All gymnast are smaller guys. I was watching ultimate beastmaster on Netflix, its an obstacle course competition. And only small guys did well at it. And I was thinking that it may be one of the best physical tests when I was watching it. But when it comes to boxing bigger is better imo. Its just that other rare abilities are very important also. For instance almost nobody can hit mlb pitching, does not matter how hard they practice or how big they are. They need off the charts hand eye coordination and being able to see faster.
I think standards in terms of size have changed over time. I think to be able to fight well with any size of modern heavyweight, 6ft 4ins and 230lbs would be an ideal size.
Ali and Holmes were the perfect specimen s for the ideal heavy imo. They faced all kinds of different styles, sizes etc of opponents and were most likely to win. The perfect fighter also needs there chin and fighting heart. Maybe not the biggest of punchers but they had enough pop to do some damage.
Well physics states that the more mass energy discharges into the more dissipated it will become. It's basically an irrefutable law of nature. However, your statement is in strict terms correct in my opinion, i'd agree with it. But this would be because there is a very small sample available. I mean with what we have to work with we have Max Baer and Buddy Baer, for example, who are so close to identical genetically it almost doesn't matter that they are different and Max has the better chin but is smaller. Go figure. But if we're (weirdly) imagining a 250lb and a 200lb man who is absolutely identical in all ways bar poundage, physics states that the 250lb man will be able to absorb more energy without suffering result x. It hardly matters though. A 250lb man can be glass jawed and a 200lb man can have an iron jaw, for sure.
So basically a fighter can have x amount of extra muscle, x amount of extra height, x amount of extra fat but it doesn't mean jack **** If he can't take a punch. That s my theory.