2.6. Body Composition
Body composition was assessed at the entry visit using a Lunar Prodigy dual-energy X-ray absorptiometry (DXA) machine (General Electric, Madison, WI, USA). The derived variables of interest were total body mass, lean body mass, fat mass, and percent body fat. Body mass index (BMI) was calculated from the measured height and weight for consideration relative to measures of lean and fat mass.