Dual-energy x-ray absorptiometry (DXA; Discovery, Hologic, Bedford, MA, USA) was used to acquire whole-body images for analysis of body composition. Participants wore metal-free light clothing, and whole-body images were obtained using manufacturer’s standard procedures. Player size regarding fitting on the DXA table is discussed above. Lean (less bone) and fat mass for the whole body and for arm, leg, and trunk regions were obtained using Tissue Analysis Method 1, non-NHANES reference data (APEX 3.3 soft-ware; Hologic). Coefficients of variation, a measure of reliability, for DXA measures at our institution measured with repositioning in triplicate on 15 adults range from 0.46% for whole-body lean mass to 1.2% for leg lean mass. Dual-energy x-ray absorptiometry images were obtained and analyzed under the supervision of a technician certified by the International Society of Clinical Densitometry (ISCD) in bone densitometry. Quality control procedures are run routinely, documented, and reviewed by the same certified technician.