Informier, Informier
Ich schrieb:
"Ein allgemeiner Überlastungs-Zustand (aka Übertraining) hat wiederum sehr wohl was mit den KH-Speichern zu tun. Eine verminderte KH-Aufnahme begünstig Übertraining (der Umkehrschluss bleibt natürlich falsch: durch gesteigerte KH-Aufnahme kann Übertraining nicht komplett verhindert werden)."
Und das wird auch durch die Meinung von Fachleuten gestützt. Insbesondere der zweite Artikel geht auf die Ambivalenz der KH-Speicher in Bezug zu Übertraining ein.
Oliver
Sports Med. 2001;31(3):167-94.
Chronic fatigue syndrome: an update.
Shephard RJ.
Defence & Civil Institute of Environmental Medicine, and Faculty of Physical Education & Health, University of Toronto, Ontario, Canada.
royjshep@mountain-inter.net
The chronic fatigue syndrome is characterised by a fatigue that is disproportionate to the intensity of effort that is undertaken, has persisted for 6 months or longer, and has no obvious cause. Unless there has been a long period of patient- or physician-imposed inactivity, objective data may show little reduction in muscle strength or peak aerobic power, but the affected individual avoids heavy activity. The study of aetiology and treatment has been hampered by the low disease prevalence (probably <0.1% of the general population), and (until recently) by a lack of clear and standardised diagnostic criteria. It is unclear how far the aetiology is similar for athletes and nonathletes. It appears that in top competitors, overtraining and/or a negative energy balance can be precipitating factors. A wide variety of other possible causes and/or precipitating factors have been cited in the general population, including psychological stress, disorders of personality and affect, dysfunction of the hypothalamic-pituitary-adrenal axis, hormonal imbalance, nutritional deficits, immune suppression or activation and chronic infection. However, none of these factors have been observed consistently. The prognosis is poor; often disability and impairment of athletic performance are prolonged. Prevention of overtraining by careful monitoring seems the most effective approach in athletes. In those where the condition is established, treatment should aim at breaking the vicious cycle of effort avoidance, deterioration in physical condition and an increase in fatigue through a combination of encouragement and a progressive exercise programme.
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Snyder, A.C.
Overtraining and glycogen depletion hypothesis
Medicine and Science in Sports and Exercise /
1998
Ätiologie; Glykogenolyse; Glykogenstoffwechsel; Leistungsphysiologie; Muskelglykogen; Sportmedizin; Übertraining
Kurzreferat
Low muscle glycogen levels due to consecutive days of extensive exercise have been shown to cause fatigue and thus decrements in performance. Low muscle glycogen levels could also lead to oxidation of the branched chain amino acids and central fatigue. Therefore, the questions become, can low muscle glycogen not only lead to peripheral and central fatigue but also to overtraining, and if so, can overtraining be avoided by consuming sufficient quantities of carbohydrates? Research on swimmers has shown that those who were nonresponsive to an increase in their training load had low levels of muscle glycogen and consumed insufficient energy and carbohydrates. However, cyclists who increased their training load for 2 wk but also increased carbohydrate intake to maintain muscle glycogen levels still met the criteria of over-reaching (short-term overtraining) and might have met the criteria for overtraining had the subjects been followed for a longer period of time. Thus, some other mechanism than reduced muscle glycogen levels must be responsible for the development and occurrence of overtraining. Verf.-Referat
