Multiple sclerosis (MS) is a complex neurological condition affecting millions worldwide. Detecting early signs of disease progression is crucial for managing symptoms and preventing long-term disability. Recent research has highlighted that subtle decreases in daytime activity among people with multiple sclerosis (PwMS) may serve as an early indicator of worsening disability.
A study conducted by researchers at the Johns Hopkins School of Medicine in Baltimore explored whether monitoring daily physical activity could help identify early changes in MS. Led by Kathryn C. Fitzgerald, Sc.D., the team tracked 238 adults with MS aged 40 years and older. Participants underwent brain magnetic resonance imaging (MRI) approximately once a year and wore GT9X Actigraph accelerometers on their wrists every three months over a three-year period.
The accelerometers provided detailed data on daily movement, allowing researchers to analyze both total and time-specific activity patterns. By studying these measurements, the team could observe how activity levels changed over time and whether such changes were linked to clinical signs of disease progression.
Over the course of the study, 120 participants experienced confirmed progression of disability, as measured by the Expanded Disability Status Scale-plus (EDSS+). On average, total daily activity declined by 43,737 activity counts, which equated to a 2 percent reduction per year.
Interestingly, the timing of decreased activity proved to be particularly important. Reductions in daytime activity, specifically between 8:00 AM and 2:00 PM, were associated with a higher risk of disability progression. A decrease in activity from 8:00 to 10:00 AM, 10:00 to 12:00 PM, or 12:00 to 2:00 PM corresponded to a 20 to 24 percent increased risk of EDSS+-confirmed progression.
Further analysis revealed that morning activity declines, from 8:00 to 10:00 AM, were linked to greater loss of brain volume. This included whole-brain volume, deep gray matter, and thalamic volume. Lower levels of moderate-to-vigorous physical activity between individuals were also associated with reduced brain volumes over time, though these reductions were not directly tied to EDSS+ progression.
These findings underscore the importance of early detection in MS. Subtle changes in physical activity can provide valuable clues about disease progression before more noticeable disability occurs. Monitoring activity through wearable devices may offer a cost-effective and accessible tool for both patients and clinicians.
Dr. Fitzgerald emphasized that timely identification of patients at risk could help reduce long-term disability. She noted that using a simple wrist-worn device could make it easier to detect early changes in disease activity and implement interventions sooner.
Wearable accelerometers offer several advantages for monitoring MS. They provide continuous, objective measurements of physical activity without disrupting daily routines. Unlike clinical assessments, which may occur only during scheduled visits, accelerometers capture real-life behavior patterns. This real-world data can highlight subtle changes that might otherwise go unnoticed.
In addition, wearable devices are relatively affordable and widely available. By using them in clinical practice, healthcare providers can gain new insights into patients' daily functioning, enabling more personalized care plans.
While this study provides strong evidence that daytime activity decreases may signal MS progression, further research is needed to validate these findings in larger and more diverse populations. Long-term studies could explore how changes in physical activity relate to other markers of disease progression, such as cognitive function, fatigue, and quality of life.
Researchers are also investigating whether interventions that promote increased daytime activity could slow disability progression. Exercise programs, lifestyle modifications, and targeted therapies may have the potential to improve outcomes for PwMS if implemented early.
For individuals living with MS, paying attention to changes in daily activity patterns may be helpful. Simple steps, such as using a wrist-worn activity tracker, recording movement levels, and noting periods of reduced energy, can provide valuable information for healthcare providers.
Maintaining regular physical activity is important for overall health and may help preserve mobility and function. Patients should consult their neurologist or physical therapist to develop safe, personalized exercise routines tailored to their abilities and disease stage.
This research emphasizes that monitoring daytime activity can serve as an early warning for MS progression. Reductions in activity between 8:00 AM and 2:00 PM are linked to increased risk of disability and brain volume loss. Wearable accelerometers are a promising tool for detecting these changes in a practical, cost-effective manner. Early detection and intervention may help reduce long-term disability and improve quality of life for people living with MS.
This blog is for informational and educational purposes only and is not a substitute for professional medical advice. Individual factors can vary significantly. Always consult a qualified healthcare provider for guidance regarding diagnosis, treatment, or management of medical conditions.
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