Hemodialysis patients display among the lowest level of daily activities and decline of functional abilities is highly correlated with mortality. Perdialytic exercise during hemodialysis procedure is now part of the patients' routine care and appears to be a solution to struggle against the functional skills decrease. Our team was able to demonstrate that beyond muscle mass, muscle strength and physical activity were essential determinants of morbidity and mortality of dialysis patients. The AIDER Santé medical team has set up an assessment of physical activities and muscle strength in the Montpellier and Nimes centers. In order to rehabilitate muscle strength and endurance, perdialytic exercise may be prescribed. Its effectiveness can be appreciated by measuring the SPPB score (Short Physical Performance Battery). Recent studies established that combined training including resistance and endurance exercises was the most effective to improve functional performance. In AIDER Santé dialysis centers, the two mainly used exercise approaches are distinguished by the time distribution of the two types of exercise: the first plans to practice both types of exercise at each session (continuous program), the second plans to alternate a week of resistance exercise with a week of endurance exercise (discontinuous program). It is established that the rehabilitation of the hemodialysis patient must include both resistance and endurance exercises, but the combination of these exercises during the same session is potentially at the origin of an interference phenomenon, limiting neuromuscular adaptations specific to each effort. Therefore, the main hypothesis of the project is that the temporal separation of resistance and endurance exercises in a discontinuous program could optimize the functional gains of combined rehabilitation and therefore be more effective than a continuous program generating a phenomenon of interference.

Inclusion criteria:

• Hemodialysis started since at least 3 months
• Medical prescription of perdialytic combined exercise
• Age < 85
• Life expectancy > 6 months

Exclusion criteria:

• Ischemic and valvular cardiopathies
• Lower-extremity arterial disease (stade III and IV)
• Knee or hip amputation/prothesis
• Severe respiratory disease
• BMI > 35
• Pacemaker

Hemodialysis patients of Montpellier AIDER Santé dialysis center