Lately I've taken to doing some running. I always liked running but have always just been too lazy. I had a free period during my last trimester of school so I took the initiative to just wear shorts under my jeans, then went down to the track during that period and began running.
I did that for about two weeks (maybe three) but now school's out and I've got a full time job
. My time has been limited, I've been lazy, weather has been crappy, and I haven't really been running like I did before (although I still run to and from the bus I have to take, which is close to a mile, and I have ran for more than that a few days).
Anyway, onto my point and question.
When I do run now, I find that my preformance varies largely. One day I was able to run for close to twenty minutes without hardly losing my breath; somedays I run for only five or ten minutes and have trouble breathing (oddly enough I got four hours of sleep the night before I ran the twenty minutes well). These aren't slow increases/decreases in preformance due to activity/inactivity; these are changes within a day of each other. Oh, and I am watching pacing and I'm not running faster or slower on these different days.
Why can this fluxiate so much? Does anyone have good advice on how I can try to keep my running at peak level?
My thanks in advance.