Three groups of participants (advanced chronic disease not yet in substitutive treatment, end-stage renal disease patients in hemodialysis and end-stage renal disease patients in peritoneal dialysis) will enter the study. The intervention will consist of a home-based exercise program. They will be provided with a booklet and the researcher will explain personally each of the exercises to the participants. Progression will be encouraged so that the participants should find the sessions 'somewhat hard' according to the rate of perceived exertion. Reinforcement will be high during the first 3 months (weekly phone calls, visits to the nephrology department) and none during the last 3 months. Assessment will be undertaken at three-time points: baseline, after 3 months of high reinforcement and after 3 more months of no reinforcement at all.~Assessment will include strength, functional capacity, health-related quality of life, cognitive state and depressive symptoms.~The aim of the study is to assess the effectiveness of home-based exercise to improve strength, physical function, health-related quality of life, cognitive state and depressive symptoms in advanced chronic kidney disease and end-stage renal disease (hemodialysis and peritoneal dialysis). We also aim at describing all these variables in the three different groups of patients. Adherence and satisfaction with the exercise program will be recorded at the end of the study.~Additionally, interobserver reliability will be calculated, so as reliability intraobserver in different measurement conditions (dialysis vs non-dialysis days).
A home-based exercise program will be implemented in three different groups of participants: advanced chronic kidney disease, end-stage renal disease in substitutive treatment hemodialysis or peritoneal dialysis. Participants will be evaluated before the program, after 3 months and after 6 months from the starting of the program. During the first 3 months the researcher will phone them weekly to reinforce the exercise habit, and during the last three months, there will be no reinforcement. Assessment will include strength, functional capacity, health-related quality of life and depressive symptoms.