Fysisk prestation och LC

Abstract Impaired physical performance is a common but not obligate result of a low carbohydrate diet. Lessons from traditional Inuit culture indicate that time for adaptation, optimized sodium and potassium nutriture, and constraint of protein to 15?25 % of daily energy expenditure allow unimpaired endurance performance despite nutritional ketosis. Introduction In the opinion of most physicians and nutrition scientists, carbohydrate must constitute a major component of one's daily energy intake if optimum physical performance is to be maintained [1]. This consensus view is based upon a long list of published studies performed over the last century that links muscle glycogen stores to high intensity exercise. It has also been reinforced by the clinical experience of many physicians, whose patients following low carbohydrate formula or food diets frequently complain of lightheadedness, weakness, and ease of fatigue. During the time that this consensus view of the necessity of carbohydrate for vigorous exercise was forming, the last pure hunting cultures among the peoples of North America finally lost out in competition with expanding European cultural influences. Between 1850 and 1930, the routine consumption of carbohydrates spread north from the U.S. Plains States through central Canada, where the indigenous peoples had heretofore made at most seasonal use of this nutrient class. However the last of these groups to practice their traditional diet, the Inuit people of the Canadian and Alaskan Arctic regions, were luckily observed by modern scientists before their traditional dietary practices were substantially altered. The reports of these early scientists imply that the Inuit people were physically unhampered despite consuming a diet that was essentially free of identifiable carbohydrate. Given this juxtaposition of clinical research results favoring carbohydrate against observed functional well-being in traditional cultures consuming none, it is an interesting challenge to understand how these opposing perspectives can be explained. This paper will review the observations of early explorer scientists among the Inuit, track the controversy that they stimulated among nutritionists in the last century, and utilize some of the forgotten lessons from the Inuit culture to explain how well-being and physical performance can be maintained in the absence of significant dietary carbohydrate.

(Länk.) Lite hetsad av Kenneths kommentar till inlägget 'Insulin är dopingklassat', så kommer här en liten kommentar till fysisk prestation och LC. Studien ovan visar tydligt på tillkortakommanden på de studier vad gäller fysisk prestationsförmåga när det gäller LCHF kontra HC. I huvudsak har man undersökt prestationerna i sammanlagt maximalt 3-4veckor, vilket vi alla som gått över till LC, vet är dimmiga och rejält nedsatt fysisk prestationsförmåga. I de fall där man tillåtit en fullständig anpassning visar resultaten att otränade faktiskt utan träning fick bättre kondition - även när man kompenserade den minskade vikten(!) med en ryggsäck med motsvarande vikt. I det andra fallet så handlade det om vältränade cyklister, de gick ner motsvarande det minskade glykogenet och hade efter några veckor exakt motsvarande uthållighet som innan. Enkla och uppenbara slutsatser är att LCHF passar för alla - i alla fall om man enbart tittar på fysisk prestation. Jag trodde faktiskt att man skulle orka längre på fettdrift, men det kanske finns svar i någon annan studie. //Zac