I grew up running cross-country and track... and so know how to run... and know that I have endurance. I can currently run five miles no sweat at a pretty moderate pace...

However, when it comes to sparring... I have no wind... two hard rounds and I am done... I mean leaning over, not able to breath... barely able to stand up...

I know that I need to relax more and that this will help... but even still... I feel it in practice/training as well...

What can I do to help improve this quickly... or as quickly as possible?

I am just frustrated that I am not able to perform to the ability that I want too... especially since I train hard... so am looking to find a better way to train... obviously if you have read my workout log you know that I am not in the boxing gym as much as I need to be... but was wondering what I can do to improve this outside of the boxing gym as time constraints and distance really are a factor here...

It's hard to concentrate on improving your skills when you can't breath and all you can think about is being able to breath until the end of the round... or unable to throw anything because your arms just won't respond anymore...

Thanks,
Blackvenom-2001