@nataliem True and the mentality I shared with the example of the fat vs muscle in terms of space it takes up helps stop the demoralizing feeling of weighing and expecting a bs number to show a lower bs number. Both are true: you aren't always putting on muscle AND muscle takes up less space than equivalent weight of fat. It takes time to put on weight and takes time to take off weight. 15% can be a lot of change in how clothing fits and how a person feels. It's better to measure the progress in terms of how one feels and how clothing fit changes than it is to step on a scale. I used a picture and simplistic math to help the person have a foundational understanding of "muscle takes up way less space than fat". Simple concepts followed by increasingly complex concepts make understanding easier.