Regular physical exercise helps increase stamina. So if you want to be a champ between the sheets, you’ve got to sweat it out at the gym or by playing a sport. Stamina however is only a part of having a good sex life. You need to know that sex isn’t just about how long it lasts but how pleasurable it is while it lasts. As long as intercourse is between 3-6 minutes, you are doing fine. If you ejaculate in any period less than that, you should work on addressing premature ejaculation.