Ventilatory Functions and Physical Intolerance in ESRD Adolescents: Response to Program of Walking With Dogs

This study is testing whether a dog-walking exercise program can improve breathing capacity and physical fitness in teenagers with end-stage kidney disease (ESRD) who are on regular dialysis. **You may be eligible if...** - You are a teenager with end-stage renal disease (ESRD) - You are on regular hemodialysis (a kidney filtering treatment done at a clinic) **You may NOT be eligible if...** - You have had a heart attack or have significant heart problems - You have respiratory (breathing) problems - You have an orthopedic (bone or joint) problem that would prevent walking - You have liver disease Talk to your doctor to see if this trial is right for you.