As noted above, our bike racer study (Phinney 1983) involved 9 lean men locked up while eating a precisely controlled ketogenic diet for 4 weeks. In addition to daily weights, three methods were used to determine changes in body composition. As a group, these subjects lost 1 kg of body weight in the first week of the ketogenic diet, all of which was attributable to reduced muscle glycogen stores (which were directly measured). After that, their weights were stable for the next 3 weeks. Unfortunately in this study we did not have the opportunity to measure metabolic rate, but based on our body composition data, anything over a 3% increase in energy expenditure associated with the ketogenic diet would have shown up as non-water associated weight loss (by implication, a loss of body fat). Clearly these 9 men did not demonstrate an obvious increase in body fat loss in the first 4 weeks of keto-adaptation.
Some scientists and journalists have concluded from this body of evidence that there exists a ‘metabolic advantage’ associated with ketogenic diets. In other words some believe that ketogenic diets cause a greater expenditure of energy (aka, calories) than non-ketogenic diets leading to the claim that ‘a calorie is not a calorie’ (Feinman 2003, Taubes 2007). However this flies in the face of a standard tenet of nutrition and dietetics that in order to lose weight, we always have to eat fewer calories than we burn – i.e., ‘a calorie IS a calorie.’
While you could lose weight and body fat by dieting alone, adding exercise will result in a better body composition after you're finished losing weight. It also appears that weight lost through exercise may be more likely to come from your belly fat than weight lost through diet alone, according to a study published in Medicine and Science in Sports and Exercise.
Research suggests that people with stronger legs are less likely to fall as they age, potentially reducing their risk of fracture and immobility, so there’s no time like the present to start shedding that extra body fat, toning those muscles, and building a strong foundation for a healthy future. Incorporate the 10 ways to lose thigh and leg fat into your routine now and you’ll be feeling stronger and more confident in no time.