נק' מוניטין:
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Int J Sport Nutr Exerc Metab. 2015 Aug 12. [Epub ahead of print]
Fat-Free Mass Changes During Ketogenic Diets and the Potential Role of Resistance Training.
Tinsley GM1, Willoughby DS.
Author information
Abstract
Low-carbohydrate and very-low-carbohydrate diets are often employed as weight loss strategies in exercising individuals and athletes. Very-low-carbohydrate diets can lead to a state of ketosis, in which the concentration of blood ketones (acetoacetate, 3-β-hydroxybutyrate, and acetone) increases due to increased fatty acid breakdown and activity of ketogenic enzymes. A potential concern of these "ketogenic" diets, as with other weight loss diets, is the potential loss of fat-free mass (e.g. skeletal muscle). Upon examination of the literature, the majority of studies report decreases in fat-free mass in individuals following a ketogenic diet. However, some confounding factors exist, such as the use of aggressive weight loss diets and potential concerns with fat-free mass measurement. A limited number of studies have examined combining resistance training with ketogenic diets, and further research is needed to determine whether resistance training can effectively slow or stop the loss of fat-free mass typically seen in individuals following a ketogenic diet. Mechanisms underlying the effects of a ketogenic diet on fat-free mass and the results of implementing exercise interventions in combination with this diet should also be examined.
Fat-Free Mass Changes During Ketogenic Diets and the Potential Role of Resistance Training.
Tinsley GM1, Willoughby DS.
Author information
Abstract
Low-carbohydrate and very-low-carbohydrate diets are often employed as weight loss strategies in exercising individuals and athletes. Very-low-carbohydrate diets can lead to a state of ketosis, in which the concentration of blood ketones (acetoacetate, 3-β-hydroxybutyrate, and acetone) increases due to increased fatty acid breakdown and activity of ketogenic enzymes. A potential concern of these "ketogenic" diets, as with other weight loss diets, is the potential loss of fat-free mass (e.g. skeletal muscle). Upon examination of the literature, the majority of studies report decreases in fat-free mass in individuals following a ketogenic diet. However, some confounding factors exist, such as the use of aggressive weight loss diets and potential concerns with fat-free mass measurement. A limited number of studies have examined combining resistance training with ketogenic diets, and further research is needed to determine whether resistance training can effectively slow or stop the loss of fat-free mass typically seen in individuals following a ketogenic diet. Mechanisms underlying the effects of a ketogenic diet on fat-free mass and the results of implementing exercise interventions in combination with this diet should also be examined.
https://dl.dropboxusercontent.com/u...raining Tinsley_ijsnem_2015-0070-in press.pdf
