Skrevet av Emne: Resistance training in overweight women on a ketogenic diet  (Lest 8382 ganger)

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Resistance training in overweight women on a ketogenic diet conserved lean body mass while reducing body fat
Pal T Jabekk , Ingvild A Moe , Helge D Meen , Sissel E Tomten  and Arne T Hostmark

Nutrition & Metabolism 2010, 7:17doi:10.1186/1743-7075-7-17

Published:   2 March 2010
Abstract (provisional)

Background
The aim of the present study was to compare the effects of 10 weeks resistance training in combination with either a regular diet (Ex) or a low carbohydrate, ketogenic diet (Lc+Ex) in overweight women on body weight and body composition.

Methods
18 untrained women between 20 and 40 years with BMI [greater than or equal to] 25 kg*m-2 were randomly assigned into the Ex or Lc+Ex group. Both groups performed 60-100 min of varied resistance exercise twice weekly. Dietary estimates were based on two 4-day weighed records. Body composition was estimated using Dual Energy X-ray Absorptiometry. Fasting blood samples were analyzed for total-, HDL- and LDL-cholesterol, triacylglycerols, and glucose.

Results
16 subjects were included in the analyses. Percentage of energy (En%) from carbohydrates, fat and protein was 6, 66, and 22 respectively in the (Lc+Ex) group and 41, 34, 17 in the Ex group. Mean weight change (pre-post) was -5.6 +/- 2.6 kg in Lc+Ex; (p<0.001) and 0.8 +/- 1.5 kg in Ex; (p=0.175). The Lc+Ex group lost 5.6 +/- 2.9 kg of fat mass (p=0.001) with no significant change in lean body mass (LBM), while the Ex group gained 1.6 +/- 1.8kg of LBM (p=0.045) with no significant change in fat mass (p=0.059). Fasting blood lipids and blood glucose were not significantly affected by the interventions.

Conclusion
Resistance exercise in combination with a ketogenic diet may reduce body fat without significantly changing LBM, while resistance exercise on a regular diet may increase LBM without significantly affecting fat mass. Fasting blood lipids do not seem to be negatively influenced by the combination of resistance exercise and a low carbohydrate diet.



http://www.nutritionandmetabolism.com/content/7/1/17


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"No restrictions were made regarding energy content, fat and protein content or
fatty acid composition. The only restriction was on intake of carbohydrates, and the goal was
to restrict carbohydrate intake until ketone bodies were detectable in the urine."

"Participants were told that they could consume unlimited amounts of meats, fish, eggs,
cheeses, margarines, butters and oils. They were further instructed to add low carbohydrate
food to their diet as they saw fit."

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Ikke imponert når jeg leser kostholdsoppsettet, mange feilkilder for å si det mildt.

Jepp, f.eks. så står det jo at det ikke var noen signifikant forskjell i totalt energiinntak mellom de to gruppene, men i følge tabellen fikk ketogruppen i seg ca 250 kcal mindre daglig under de fire kontrolldagene.

Denne studien sier altså at at et kaloriunderskudd gjennom å begrense inntak av en energikilde (i dette fallet karbohydrater) + trening fører til at du mister fett og beholder musklene, mens hvis du fortsetter å spise som vanlig + begynner å trene så bygger du muskler.

Trengte de virkelig å bruke tid og skattepenger for å finne ut dette?


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