Know the Two Types of Overtraining

From FloTrack

(Editor: This is pretty heady stuff, but I recommend wading through and learning.)

Addisonoid type of overtraining is when the parasympathetic system and vagal tone or dominant. Basedovoid overtraining is when the sympathetic system dominates and the athlete is in a hyperadrenergic state. Basedovoid overtraining encompasses the more classic symptoms you have probably all experienced: sleep disturbance, lack of appetite, high resting heart rate, depression, and irritability. As a distance runner you would experience this during the intense workout part of the season, and it is generally encountered in power sports. Addisonoid overtraining is harder to diagnosis because you do not show the classic symptoms, but the end result, a.k.a. your performance will be hindered. Addisonian overtraining is typically a result of high volume monotonous training, as seen in base training. Bringing it back to hormones; these types are both related to adrenocortical subactivity or thyroid hyperfunction.