I don't feel all that exhausted when I run, but my legs do feel like lead weights. They don't feel like this when I run short bursts, like say at football practice. I wonder if my leg workouts impact this at all.
I have been doing lower body workouts -- leg press (complete lower body; 3 sets of 13 reps at 230 pounds), leg extension (quadriceps; 3 sets of 13 reps at 150 pounds), leg curls (hamstrings; 3 sets of 13 reps at 150 pounds), and calf raises(3 sets of 13 reps at 200 pounds). I have definitely noticed muscle gain and better strength, coordination, and balance as a result. I know that the sort of strength training I do is suited for building short-twitch muscle fiber, the kind sprinters develop. Long-distance running develops long-twitch muscle. By continuing my lower body workouts and taking up long-distance running again, am I being counterproductive? Should I change the nature of my weight work? Or should I start running sprints (110s and the like) instead of the distance running? Any thoughts?