That is correct. Anyone with good insulin sensitivity in the first place can lose some of that by eating a low carb diet chronically.
Originally Posted by tatertot
I managed to become quite obese while retaining excellent insulin sensitivity. My blood glucose levels were in the ideal range about 2 hours after eating 100 g of chocolate (as a test, not a matter of course) even at my most obese. I gained weight through having to avoid exercise as it lowered my blood pressure and caused other problems that made me weak.
Exercise is usually the one of the best means of maintaining insulin sensitivity as the muscles are a key endocrine organ, boosting the immune system as well as regulating blood sugar levels. Low-level cardio is perfect.
The less active someone is, the weaker the insulin sensitivity of their muscles, hence the more dietary glucose is taken up by the liver, which makes it more difficult to go into ketosis.
That's why PB recommends more glucose (starch) in line with activity for active people who want to stay that way.
The potato diet is worth considering once a month, IMO.
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.