Who has/had the best cardio in the boxing history?

[-Antonio-]

Aaron Pryor.

This.

Can't forget about Hank Armstrong either. Perpetual motion.

Also Paul Williams was a machine too as far as recent.

[JK1700]

This.

Can't forget about Hank Armstrong either. Perpetual motion.

Also Paul Williams was a machine too as far as recent.

This is true. Williams had a ton of energy for someone fighting below his natural weight. If anything you'd expect him to move more not throw loads and loads.

[Tony Trick-Pony]

In the history of boxing, which fighter has had the best cardio in terms of never getting tired while being active?

Also, is super human stamina about genetics or training?

Henry Armstrong. For him, it was both. He trained like a fool and an autopsy revealed a heart physically bigger than most men his size. Freaky but man, he was so much fun to watch.

[Tony Trick-Pony]

Aaron Pryor.

******* gives everybody stamina.

[Furn]

Phillip Holiday

[SkillspayBills]

Duran had Unreal stamina. In 49 fights I've never seen Floyd tired. They stand out to me.

[Tom Cruise]

Henry Armstrong

[Mike D]

Listen I hate the guy but credit where credit is due -- Kenny Rainford had some really stellar stamina.

Sutherland woulda beat that ass but he started to gas after the first 20 seconds.

[iamboxing]

Mayweather. Behind all the glitz he's a workhorse, never misses a day at the gym and looked in top shape in every fight he's been in.

[SlySlickSmooth]

Mayweather never looks tired