Background: There are studies on long-term testosterone replacement in older adults with hypogonadism showing benefits on body composition, sexual function and mood but not on testosterone replacement therapy in combination with lifestyle change (diet-induced weight loss and exercise) in the specific population of older adults with both obesity and hypogonadism.~Purpose: To determine if long-term lifestyle change and testosterone replacement therapy with associated improvement in physical and metabolic health can be maintained in obese older adults .~Design: Overweight/obese older veteran patients with obesity and hypogonadism who are being followed at the endocrine clinic while receiving standard of care consisting of diet and exercise counseling (for healthy lifestyle change) and testosterone replacement therapy will be recruited for testing of physical, metabolic, cognitive/mood, quality of life, and body composition testing.
Older hypogonadal obese veterans previously participated in a 6 month lifestyle change (diet-induced weight loss and exercise) study with or without testosterone replacement therapy before being followed for the following year at the clinic while receiving standard of care consisting of diet and exercise counseling (for healthy lifestyle change) and testosterone replacement therapy. This study will determine if long-term lifestyle change and testosterone replacement therapy with associated improvement in physical and metabolic health can be maintained in obese older adults.