My endurance and strength have always been my weaknesses. Endurance is weak mostly because I hate long distance running. I rather exercise at high intensities for a short amount of time, but I have read from various sources that you must build an aerobic base through running before you can move on to more intense forms of running. Is there any truth to this? Right now, I could barely finish 2 miles straight without feeling gassed out. I would also like to add that for the last 4 years I have trained by myself, so must of my workouts consist of weights (compound movements at 5 rep max) and 40-100 meter linear sprints. My off the ball movement and straight running seems to have improved tremendously. I could break almost any offside trap, but I have a hard time being mobile with the ball like I use to. I use to be able to change directions with ease, and felt I could maneuver with the ball much easier. Now I am somewhat stiff despite not gaining much muscle mass (my chest and upperbody got a bit bigger,and my legs stayed the same, I am not sure if this is what is contributing to the problem.) Anyways sorry for rambling on but I really I want to be the best version of myself, and it seems like every year, the more I train by myself, the farther away I am getting from my preferred playing style.