Whats the best way to build your stamina up?

[Joey Giardello]

Well????????

[paulsinghnl]

running, long runs for stamina on somewhat hard pace, and shorter harder runs for explosiveness. running is the BEST, that's first priority for any boxer.

[EzzardFan]

Hindu squats.

And sparring for as long as possible without taking a break.

[iceman1]

running and swimming

[Suckmedry]

Hard sparring, running (both long runs, sprints etc), hard rounds on the pads and bag

[Bullrush]

Rope skipping, working the heavy bag, sparring.

Running isn't that important. Personally i prefer skipping rope because for your foot work, coordination and all that other stuff. Running doesn't really help you at all.