Effect of Intradialytic Physical ACTIvity in Addition to a NUTritional Support on Protein Energy Wasting and Physical Functioning in Chronic Hemodialysis Patients ("ACTINUT" Study)

Aim 1: To determine the percentage of patients in remission from the state of protein- energy wasting. Hypothesis 1: Patients in the exercise group will more frequently reverse the PEW than in the control group Aim 2: To determine the patterns of change in body composition (fat free mass). Hypothesis 2: Patients in the exercise group will maintain or increase their fat free mass and patients in the control group will decrease their fat free mass Aim 3: To determine the effects of exercise on muscle strength. Hypothesis 3: Patients in the exercise group will maintain or increase their quadriceps strength while patients in the control group will decrease their muscle strength Aim 4: To determine the effects of exercise on postural balance. Hypothesis 4: Patients in the exercise group will maintain or increase their body balance while patients in the control group will decrease their body balance Aim 5: To determine the effects of exercise on quality of life as assessed by the SF-36. Hypothesis 5: Patients in exercise group will maintain or increase their quality of life form while patients in the control group will decrease their quality of life