Is there any way to increase my stamina?

Question

And not just in the bedroom, I mean. I'm a reasonably fair sprinter, and I can do a lot in short bursts, but I cannot endure ANYTHING for a long period of time, whether it's standing up for 2 hours or jogging for a kilometer.

I'd like to know how to improve my endurance.

Answer 1

You can't have both. If you develop your slow twitch fibers then you will neglect your fast twitch.

Answer 2

Slowly build up the distance you run, or the amount of exercise you do. Your body will adjust.