A few years ago we took a summer vacation to Arizona ...... in July. We live in muggy humid northern Virginia where it was about 90, we had a lot of concern about going to AZ where it was 110 and zero humidity. It was easier for Kim to walk there?!?!?!? Not that it was like she could run or stuff, but she did a lot more walking in AZ, more distance per day than she could at home. Made me wonder.

Russell Johnson, a meteorologist with MS who made the connection between dew point temperature and MS symptoms some time ago has written a number of papers on the subject. Unfortunately you can't get at the papers for free on the internet. But, in a nutshell, he lays out a framework that shows that humidity is the oft overlooked variable, it's not just about heat. Ken

Ken - I think you made a very valid point. While it is hot in AZ, during the monsoons when it is more humid I have more muscle spasms, fatigue, and difficulty ambulating for any length of time, and generally more MS symptoms popping up on a daily basis. Once the humidity goes back down I start doing better. Hence, it is during the monsoon season that I tend to "hibernate" more.

We've had a mild temp summer so far here in mid ohio, but the humidity has been high. Can we say spasm marathon?

It is definitely the humidity that zaps me. It's not as humid today as it has been recently and I can feel a huge difference in the way I feel.....and the way I walk.

I'd go to bed with muscle spasms in my legs so bad I'd be crying.......checked the humidity and it was over 80%. Today it's low....51% and I feel so much better. Not great but better.