Your question is too general, is this for you personally? And if so, what are your goals?
Falling asleep?
Sounds like you have circulation problems, do you keep hydrated (during x-exercise) and do you wear compression tights/pants?
No on the compression pants.
Not sure about the hydration. I keep hydrated throughout the day...but I'm not sure if I drink a lot leading up to the run. Makes me feel heavy.
Regarding athletes, not necessarily. Especially dudes who have to run a lot (soccer players, basketball players). All that shyt kinda gets in the way.After HS, I started weight lifting and can't even dunk anymore. My speed and agility went down too. I try to keep what I have left through pick up games, box jumps, sprints, and jump rope.
If you look at the pro athletes..those dudes are animals. Size and athleticism