Keto X Fit kely to have loose skin such as smoking, sun damage and skin color. - Exercise Exercise that includes increasing muscle town can tighten connective tissue. For patients who have undergone bariatric surgery are recommended to add a regular exercise regimen that is helpful to maintain ones weight and can also serve to tighten loose skin to some extent. - Body Contouring Procedures For those that are losing lbs. to over lbs. surgical procedures, known as post-bariatric surgery, are available to tighten skin and remove the extra pockets of sk.