text: Background and purpose: Physical activity (PA) is often reduced in people with 
  MS (pwMS), even when disability is low. Understanding the perspectives of pwMS 
  on interventions aiming to improve PA is important to inform the development 
  of such services. The aim of 
  this study was to explore the experiences 
  of pwMS participating in an outdoor, high-intensity and balance exercise 
  group intervention. 
  Methods: This qualitative study was nested within an RCT exploring a novel 
  intervention integrating sensorimotor exercises with high-intensity intervals of 
  in-depth interviews with the intervention group 
  running/walking. 
  (n = 15; 12 women, 3 men; age 38–66; EDSS score 0–3.5) were conducted 
  postintervention (mean days = 14), analyzed using a phenomenological- 
  inspired approach with systematic text condensation, and interpreted based on 
  enactive theory. 
  Results: Four categories were generated: (1) Exploration of one’s own physical 
  abilities: Challenging one’s own limits was perceived by all participants to 
  improve movement performance and/or intensity level. Such bodily changes 
  engendered strong positive feelings. Some negative consequences of high- 
  intensity training were described, increasing a feeling of loss. (2) New insights 
  and beliefs: Participants experienced enhanced beliefs 
  in their own 
  capabilities, which they integrated in activities outside the intervention. (3) An 
  engaging environment: The group setting was perceived as supportive, and 
  the outdoor environment was perceived as stimulating activity. (4) Professional 
  leadership, 
  tailoring and co-creation of enjoyment: Physiotherapist-led, 
  individualized interactions were regarded as necessary to safely revisit prior 
  activities, such as running. Co-creating enjoyment facilitated high-intensity 
  training and intervention adherence. 
  
  Individual, 