Downloadable mobile applications for use in analyzing or determining body composition; Under water weights to offset the buoyancy of a user when performing underwater body composition analysis; Water floats to decrease density of a user when performing underwater body composition analysis; Hanging weigh scales; Hydrometers; Flask for use in a hydrometer; Portable electronic digital scale

Volumetric inflatable air bags for use in performing body composition analysis for medical purposes; Body composition analyzer for medical purposes; Mouthpiece for use in breath gas collection