Inclusion Criteria:  For phase one subjects must be age 18 or older, be a medical students at Rowan University School of Osteopathic Medicine and not have leg edema which does not resolve with overnight limb elevation. For phase two subjects must be patients at the NJISA in Stratford, NJ age 55 and over and have lower limb lymphedema. Lymphedema is defined as edema that does not resolve with overnight elevation of the lower limb.  Exclusion Criteria:  Exclusion criteria is the same for both phases. Because the measurements involve placing the lower limb into water subjects with an open wound, sore or cellulitis in the lower limbs will be excluded to ensure good hygiene. Because lymphatic pumping can cause a redistribution of volume in the body, subjects with decompensated heart failure, acute asthma, COPD exacerbation, or active cancer will be excluded. For obvious reasons, those with a non-healed or healing bone fractures will be excluded. Due to potential problems with informed consent those with a diagnosis of dementia on the chart problem list will be excluded.