The primary research question includes "what is the additional effect of intensive IPV treatment in combination with active breathing exercises on respiratory power (Peak Expiratory Flow, PEF) in people with MS?".
In a single-center randomized clinical trial, 96 people with MS-related respiratory problems will be allocated to either the intervention group (IPV + active breathing training) or the control group (active breathing training only). Interventions will be provided by trained speech- and language therapists, in combination with a multidisciplinary rehabilitation programme of 3 weeks. Pre- en posttraining assessment includes measures of respiration, speech and fatigue.