When you talk about weight loss there are some important distinctions that need to happen. Certainly when you lose weight you are losing some combination of fat, muscle and water. How you workout and when pushes things either in the right direction or the wrong direction (maximizes fat loss compared to water and muscle). 

If you switch to long workouts too soon and avoid certain workouts you will push your body to losing more muscle and water. That's what this podcast walks you through.