Why Crash Weight Loss Programs Don't Work:
Devotees of paleo or keto will talk your ear off about why their diet is the most sensible. People choosing vegan diets (no animal products, including dairy) make a compelling case for both personal and global health.
It's an eternal question: What diet is best for weight loss? Or, what should we eat (or avoid) to stay healthy? Herman Pontzer, an evolutionary anthropologist at Duke University, argues that human metabolism has evolved to the point where how we eat and expend our calories is more important than all of our collective obsession with what to eat. In his new book, Burn: New Research Blows the Lid Off How We Really Burn Calories, Stay Healthy and Lose Weight, Pontzer breaks down the science of metabolism and shares tales from his work studying caloric expenditure among hunter-gatherer societies.
One of the most startling findings is the notion of constrained daily energy expenditure. This is the idea that the human metabolism adapts to our activity levels to keep our daily calorie burn in a surprisingly narrow range — no matter how hard you work out. But don't let that depressing fact hold you back from the gym — it's crucial that you still get daily exercise for weight maintenance and overall health.