There are always times that fitness isn't enjoyable, like running at zero or thirty degrees). If it's bad the entire time you might be stressing too much and it

There are always times that fitness isn't enjoyable, like running at zero or thirty degrees). If it's bad the entire time you might be stressing too much and it probably means that you need to take it slower. Take some rest (but not too much). Also experiment with listening to music or different times of the day.