In high school, my body didn’t seem to go through many changes. As far as exercise goes, I stuck with track and field and figure skating. I never exercised outside of whatever practice I was going to during the week. As far as nutrition goes, I had a lot of the same habits as middle school but developed quite a few new unhealthy habits. Once I could drive and spend late nights with friends, my nutrition was crap. I remember stopping at QT (the best gas station in existence) on the way to every shift to work and getting a drink and snack or candy. I remember meeting friends late at night at whatever fast food joint. I remember ice cream multiple days of week in the summer, snacking after school before dinner, and snacking again before bed. One positive choice I made as a high schooler was when I vowed never to eat fast food meat again (I had to read the book “Fast Food Nation” in an English class and was disgusted about the fast food meat industry and have never missed it since). As far as body image goes, again, I remember feeling overweight and embarrassed, but also being muscular because of figure skating. Again, like middle school, really solid and supportive friends surrounded me so I never felt isolated or disliked because of my weight. However, I would say in middle and high school I never felt confident in my body or loved the way I felt or looked.
Switching from carbs to ketones does not happen overnight – it takes weeks of consistently restricting carbs for this process of keto-adaptation to fully occur. But once this process is complete, the body can burn fat at over twice the rate compared to when carbs were a major component of the diet (Phinney 1983, Volek 2016). And this remains true even when comparing highly trained athletes, where we have shown that high-level endurance training in the context of a high carbohydrate diet cannot come close to matching keto-adaptation in giving the body permission to burn fat.
Most women will need to eat and drink fewer calories and get the right amount of healthy foods to lose weight. Increasing exercise or physical activity may help with weight loss, but choosing healthy foods (lean protein, whole grains, vegetables, and fruits) is what works best for many people to achieve a healthy weight.1 Combining healthy eating with increased physical activity is best. Talk to your doctor or nurse before starting any weight-loss program. He or she can work with you to find the best way for you to lose weight.