I'm recently playing in a professional new soccer league. All is good except I have a problem of my own. I'll admit. I have not been to the gym since last summer . I lost all my endurance. I play striker and am constantly having to run back and forth down the field. Problem is, that I can only last like 10-15 minutes now before I am out of breath and walking which can ultimately cost the team the game if we dont keep the ball on the other side. I'd like to last longer ( ). Any tips/suggesstions on to get me started? Should I go for slow jogs every morning (downhill? uphill?) Basketball for an hour each day? Treadmill? Biking (which I do at least twice a week already) Stationary biking? How can I improve my endurance?