3) You’re tired all the time
There’s a reason you’re dragging at all hours, even right after chugging coffee: A lack of good sleep paired with increased stress hormones can result in constant drowsiness.
4) You’re moody
Overtraining can lead to a decrease in the production of certain hormones—specifically, catecholamine, which can influence the sympathetic nervous system. The result? Increased feelings of stress and irritability.