A keto diet forces the body into a state called ketosis, meaning that the body's cells depend largely on ketones for energy. It's not entirely clear why that leads to weight loss, said Jo Ann Carson, a professor of clinical nutrition at the University of Texas Southwest Medical Center and the chair of the American Heart Association's (AHA) Nutrition Committee, but ketosis seems to blunt the appetite and may affect hormones like insulin that regulate hunger. Fats and proteins may also keep people fuller than carbohydrates, leading to lower calorie intake overall, Carson told Live Science.
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If your goal is to try to lose weight, you might want to consider doing cardiovascular exercises as opposed to weight training. Cardio training is important for burning fat and losing weight, whereas weight training helps to tone and maintain muscle mass. Cardio work that increases the heart rate and breathing is more effective at burning fat than is adding muscle.
The 20-minute fat-burner: Try this workout from Carmichael. It varies your sprints to challenge your cardiovascular system and muscles in different ways. Following your warmup, start cycling at an intensity that's about 95 percent of your full effort for 90 seconds, followed by a 90-second recovery interval at about 40 percent of your full effort. Then, using the same intensities, perform 60-second and 30-second intervals. After the final 30-second recovery period, cycle at 70 percent of your full effort for 4 minutes, then repeat the entire set of intervals.
Having worked as a certified fitness trainer for over 23 years, I’ve long since come to the conclusion that if you’re looking for the best exercise to shed a few pounds—and keep them off—nothing beats cycling. Over the years, I’ve seen clients shed half their size and heard from readers who have lost more than 100 pounds by adding cycling to their weight loss arsenal, which, yes, must include a healthy diet. (But you already knew that.)