Yes there is! I am in the Army and we learned the secret to stamina! The best thing is that the stamina workout must be done only 3 times a week alternating days and it only takes about 20 minutes!
What you do is sprint as hard as you can for 30 seconds straight. And by sprint I mean SPRINT. Run as hard as you possibly can for 30 seconds straight. Then after the 30 seconds, just walk for about 2-3 minutes. Repeat this 4-7 times for a workout. I guarantee your stamina will significantly increase within 2 weeks since this workout puts such a large strain on your cardiovascular system; sending it into crisis mode.
You'll increase your speed and stamina significantly at the same time! Best of luck to you.
What you do is sprint as hard as you can for 30 seconds straight. And by sprint I mean SPRINT. Run as hard as you possibly can for 30 seconds straight. Then after the 30 seconds, just walk for about 2-3 minutes. Repeat this 4-7 times for a workout. I guarantee your stamina will significantly increase within 2 weeks since this workout puts such a large strain on your cardiovascular system; sending it into crisis mode.
You'll increase your speed and stamina significantly at the same time! Best of luck to you.
Source:
US Army 11B Rifleman 25th Infantry
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