I seem to get a real physical depression for a few days each month, which I really struggle through - my mood is low and my body just feels heavy and everything is more effort. I experienced the effect of this on my run this morning, but pushed through and felt please that I got through: feeling challenged, but successful. However I have felt shattered all day, whereas usually the morning run gives me lots of energy and stamina for the day.
Does anyone else experience anything similar? Has this improved if you've been running for a while? What do you do to cope with it?