The incentives of our medical and food systems pressure patients to not ask questions. These incentives also lead to the biggest lie in healthcare. That the reasons we are getting sicker, fatter, more depressed, and more infertile are complicated. The reasons are not complicated. They all tie to good energy habits.

Nearly every doctor I worked with dreamed as a child about curing disease and worked like crazy to become a doctor. They studied tirelessly to learn science, entered medical school with idealistic visions, and became the pride of their family. They entered residency with hundreds of thousands of dollars of student loan debt and initially saw the chronic sleep deprivation and verbal abuse by their superiors as integral parts of the experience — because “great achievement is born of great sacrifice.” But almost universally among doctors I have met, this idealism eventually turns to cynicism. My colleagues in residency talked often about questioning their sanity, of wondering whether this was all worth it. I spoke with successful surgeons who’d drafted their resignation letters dozens of times. Another had a recurring daydream of leaving everything behind and becoming a baker. Many of my supervising physicians were desperate to spend more time with their children. I witnessed more than one tearful breakdown in the operating room when surgical cases were delayed and led to yet another missed bedtime for their kids. Several had dealt with suicidal depression. I understood why doctors had the highest burnout and suicide rate of any profession. Inevitably, these conversations led to an insight that I believe is whispered by doctors in every hospital in America: they feel trapped inside a broken system.

low-grade activity that occurs more frequently and regularly throughout the day is extremely important for cellular health and glucose control, even more so than chunking all your physical activity in one discrete block and sitting for the rest of the day (a pattern most Americans adopt).