Impact of Whole-Body Cryotherapy on Pain, Sleep Quality, Functional Status, and Quality of Life in Multiple Sclerosis: A Comparative Study with Follow-Up

Background/Objectives: Whole-body cryotherapy (WBC) is widely recognized for its analgesic and anti-inflammatory effects. Despite growing interest in its therapeutic potential, the impact of WBC on functional performance, pain perception, sleep quality, and quality of life among individuals with multiple sclerosis (MS) remains underexplored. This study aimed to assess the effects of a 10-session WBC protocol on functional and psychological parameters in patients with MS and compare them with individuals without neurological disorders. Methods: A total of 73 participants divided into two groups, non-neurological individuals (non-MS, n = 43) and patients with MS (MS, n = 30), underwent 10 WBC sessions (−120 °C to −130 °C) over 2 weeks. Assessments included the Numerical Rating Scale (NRS), 30-Second Chair Stand Test (30CST), Timed Up and Go (TUG) test, and Pittsburgh Sleep Quality Index, with the WHOQOL-BREF conducted pre-treatment, post-treatment, and at a 10-day follow-up. Results: In the MS group, significant improvements were observed post-treatment in the NRS, 30CST, WHOQOL-1, and PSQI. However, only the CST and WHOQOL-3 maintained improvements during follow-up. In the non-MS group, statistically significant improvements were observed post-treatment across most parameters, except for the NRS and WHOQOL-3, with most effects diminishing by the follow-up. No deterioration in any assessed parameters was observed in either group. Conclusions: WBC demonstrates potential benefits for managing MS symptoms, particularly pain and sleep quality, with no observed deterioration in parameters and some effects emerging only during follow-ups, underscoring its safety and the need for further research on long-term outcomes.