The way you feel doing any sort of exercise can vary from day to day, just as JainMD stated. When I feel lousy, I just cut back on the intensity. I don't want to get hurt or sick, because my body is obviously telling me something. I'll walk or run slower, or opt for a shorter distance. If I'm in my aerobics class (which I teach), I may work at a lower impact. If I'm lifting weights, I'll do fewer reps. Don't push it if you're body's not up to it, but a little exercise is better than none at all.
I only run 3 or 4 times per week. Thanks.
Hi,
I would say it is normal but what I am concerned about is whether you are consistent in running daily or do you take breaks for couple of days before you start running again.
There are several factors which could change everyday running like stress, anxiety, mood change etc.
But yes if you are consistent and you do hard work too then it will pay you in longer duration.
Hope this helps.
Bye.