They both ended up being stinkers of champions Eric lol.

I think you'll find that the stamina of todays boxers is far better in terms of their VO2max and it can be directly measured. Because of not only the size but the explosive training done these days that was not in the past though they tend to fight in bursts of high energy punches rather than sustained tippy tap type shots. Were a current fighter to throw shots like Ali they'd no doubt sustain it much longer. But he would get walked through imo.

Ibeabuchi and Tua were modern boxers and they broke the record for punches thrown in a HW fight. And they weighed 240lbs, Ike was pure muscle and Tua was muscle and fat. Neither looked anywhere near as puffed as Frazier and Ali.

We can agree to disagree power puncher it's ok, I respect your opinion and it's fine for you to have it I'm obviously not changing your mind either, I just want to point out that it is you guys who make the outrageous claim that fighters from 50 years ago would take it to todays guys and then try to say that I don't have evidence. The burden of proof should be on you.