Keto diets, like most low carb diets, work through the elimination of glucose. Because most folks live on a high carb diet, our bodies normally run on glucose (or sugar) for energy. We cannot make glucose and only have about 24 hours’ worth stored in our muscle tissue and liver. Once glucose is no longer available from food sources, we begin to burn stored fat instead, or fat from our food.
The course you choose may have the biggest impact on the number of calories you burn because it will affect both duration and intensity. For best results, you want to choose a course that allows you to pedal consistently without taking too many breaks at stoplights or intersections. These short breaks cause your heart rate to drop, take up too much workout time, and decrease the calorie-burning potential of your ride.
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.
The modified Atkins diet reduces seizure frequency by more than 50% in 43% of patients who try it and by more than 90% in 27% of patients. Few adverse effects have been reported, though cholesterol is increased and the diet has not been studied long term. Although based on a smaller data set (126 adults and children from 11 studies over five centres), these results from 2009 compare favourably with the traditional ketogenic diet.
If you’re looking to lose a few pounds, cycling is a great way to start. Hopping on your bike and going for a long, easy ride or doing something shorter and faster both have immense health benefits. But what you eat matters, too, although you don’t necessarily have to forego your favorite foods in order to lose weight. Here are 13 tips that will help you get the ball (er, wheels) rolling.