DEAR DOCTOR K: Please settle a long-running argument between me and my sister. What's more effective for weight loss, diet or exercise?
DEAR READER: Losing weight can be a challenge. The best approach is to eat less and exercise more. But that's not what you asked me. Let's say one person cuts back on calories without exercising and another person increases exercise without cutting back on calories. The first person would probably find it easier to lose weight. That's because it's easier to cut 500 calories a day from your diet than to burn 500 extra calories through exercise.