best ways to improve fitness?

[Elite_Fry]

what the best ways to improve your fitness? stamina, endurance etc...
and are there any supplements which are good for energy??

 

[Lord_Suston]

To improve stamina for a related sport you must train for that sport. But for overall endurance it really doesn't matter as long as the cardio requirements are tough enough to keep you in a high heart range (not too high though). I find swimming running wrestling and boxing the best forms of training for endurance, at least for me.

 

[Mjollnir]

That's easy

http://www.concept2.com/Default.asp?bhcp=1

Best all-around exercise that I know.

Oh, rock climbing as well, but I'm far to large for that. Gotta practically be a freaking spiderman.