Hi Bee, it could be an MS thing and it could be something else.

Make a note of it in your calendar and keep track if it happens again. Many of us struggle with nerve spasms that involve many muscle groups at once. I am in that group.

Also, tremors are not uncommon among us.

My guess is that your bod wasn't very happy with the unusual exertion from the bike ride and you experienced some nerve aggravation/inflammation from it. You may have overheated your body as well, and heat can amplify symptoms rather quickly.

Pay attention to it for awhile and write down what you experience, your neuro wants to know this stuff.