This study is a randomised controlled intervention trial for dialysis patients with chronic kidney disease (n=32). The aim of this study is to test the effectiveness of an intradialytic training with a simple bed compatible trainingstool in comparison to a control group.

Patients are randomised to either the intervention or control group at the beginning of the study. Both groups are evaluated at the beginning and after 2 months regarding their body composition, physical performance, fatigue and quality of life. The control group receives usual care. The intervention group receives an intradialytic exercise training with a bed compatible trainingstool.

Inclusion Criteria:

• Patients ≥ 18 years
• Patients who started dialysis more than 3 months ago
• Patients must be mentally and physically able to participate in exercise

Exclusion Criteria:

• Patients who are not mentally or physically able to participate in intradialytic exercise. These include patients with uncontrolled high blood pressure and uncontrolled diabetes mellitus, diseases that impair physical performance or/and could be aggravated by activity, such as ischaemic cardiopathy or symptoms associated with coronary heart disease, chronic coronary heart disease, chronic lung disease and orthopaedic conditions that make exercise impossible.