I took it to mean that the goal is a reduction in adiposity. For most cases, weight loss will mean that, but it is also possible to become sarcopenic or chroni

I took it to mean that the goal is a reduction in adiposity. For most cases, weight loss will mean that, but it is also possible to become sarcopenic or chronically dehydrated, be lighter, and be in worse health. Most studies look at more than just weight, they minimally assess BMI and ideally estimate body fat percentage. Some go further, looking at relative risk of other endpoints such as heart attack, heart failure, stroke, diabetes, injury, hospitalization, death, etc.