Will this sense of tiredness go away?

Here is My Question:
I'm three months into a potential relapse. When I walk up a flight of stairs I often get a delayed sense of tiredness, but it doesn't affect my strength. I can just keep going. I'm a runner with MS and can even sprint up many flights of stairs. Yet I often get this sense of tiredness when walking up just a few steps. I don't have any clinical weakness. I never trip. With this potential relapse I also get a random floating sense of tiredness in limbs when walking or running. I can always keep going, but it seems to require more effort of me. Other symptoms in this relapse were just sensory such as burning, vibrations, tinglings, and pain that were constant at first and now intermittent or gone. Is this sense of tiredness just a sensory symptom? Is there still a chance that it will recede although it's been three months?

Answer:
The “delayed sense of tiredness” you describe with exertion could be related to your relapse or deconditioning. This should improve with further recovery and conditioning.

Revere (Rip) Kinkel MD
Professor of Clinical Neurosciences
Director of the Multiple Sclerosis Program
Clinical Neurosciences Director
University of California San Diego