A small Feb. 20, 2017, study looked at the impact of a six-week ketogenic diet on physical fitness and body composition in 42 healthy adults. The study, published in the journal Nutrition & Metabolism, found a mildly negative impact on physical performance in terms of endurance capacity, peak power and faster exhaustion. Overall, researchers concluded, “Our findings lead us to assume that a [ketogenic diet] does not impact physical fitness in a clinically relevant manner that would impair activities of daily living and aerobic training.” The “significant” weight loss of about 4.4 pounds, on average, did not affect muscle mass or function.
I used to be 100 pounds heavier than I am now. My eating habits were out of control and pretty much the epitome of mindless. I am A.D.D., I have two kids under four, and I work full time, so eating without constant distractions just doesn't happen. But over the years I’ve learned what it takes for me to lose my weight... and most importantly, keep it off.