Changes

** There can also be changes in [http://en.wikipedia.org/wiki/Intrapersonal_communication Self Talk] such as an increased negativity<ref name="OTPhysioReview"/>.

** There is often a lack of [[Motivation]] or a change in [[Motivation]] so that a fear of failure is the dominant driving force rather than a desire to succeed.

** '''Elevated [[Resting Heart Rate]]'''<ref name="OTPhysioReview"/>. Changes in [[Resting Heart Rate]] have been associated with many cases of [[Overtraining Syndrome]]. While this can be a useful symptom to monitor for early detection of [[Overtraining Syndrome]], it is not reliable as an elevated [[Resting Heart Rate]] is not always seen with [[Overtraining Syndrome]]<ref name="OTEcssPos"/>, and in sometimes [[Overtraining Syndrome]] decreases [[Resting Heart Rate]] than increasing it<ref name="OvertraingInSport"/>.

** '''[[Heart Rate Variability]]''' has been suggested as another measure of recovery and [[Overtraining Syndrome]], but studies to date do not provide evidence of its usefulness. Measuring [[Heart Rate Variability]] requires a relatively expensive [[Heart Rate Monitor]] and is less convenient than checking [[Resting Heart Rate]] which can be measured with a [[Pulse Oximeter]].

* '''Infection or illness'''<ref name="OTPhysioReview"/><ref name="OTEcssPos"/><ref name="OTAdjust"/>. Like a major depression, [[Overtraining Syndrome]] tends to suppress the immune system resulting in more infections and illnesses, especially Upper Respiratory Tract Infections (colds). This can also manifest itself as a slower healing of minor cuts<ref name="OTAdjust"/><ref name="OTPhysioReview"/>, or a swelling of the lymph nodes<ref name="OTAdjust"/>. However, many of the symptoms of [[Overtraining Syndrome]] could be due purely to an illness, so it can be unclear if the illness is a symptom of [[Overtraining Syndrome]] or the symptoms of [[Overtraining Syndrome]] are actually just symptoms of the illness.

* '''Insomnia or disturbed sleep'''<ref name="OTPhysioReview"/>. [[Overtraining Syndrome]] tends to interfere with sleep, which in turn impairs recovery and rest, leading to a positive feedback cycle.

* '''Thirst'''<ref name="OTPhysioReview"/>. While hydration is obviously an important part of recovery, I suspect that it's possible that an increase in thirst indicates some more profound imbalance in overtrained athletes.

* '''Clumsiness'''<ref name="OTPhysioReview"/>. It is been noted that overtrained athletes seem to have impaired coordination and a general sense of clumsiness.