When I first started training this was an issue for me as well. Now I know I have regulate my temp or I will run into issues.

Indoors - I drink a ton of COLD water, and that really helps. (I have several polar bottles that live in the freezer - also get the big ones, the small ones are just too small IMO) I also wear the right clothes so I don't overheat.
I tried one of those neck things - but it bothers me to have something around my neck.

Outside, when I bike, I have 4 bottles on my bike. 2 of them, I'm pretty much dumping on my head during the ride. When I run outside, I always run with one of those water bottles that straps to your hand, I use that to cool down when needed. I also run w/ a "runners" visor that keeps the sun off my face which helps alot. It also has a thick terrycloth type band on it. If its hot out, I make sure that its soaked w/ cold water. During a race, I keep it in a cooler of Ice water, and it helps regulate my temp when I get off the bike and transition to the run.

Outdoors, clothing is huge, I make sure to wear clothes that wick moisture away and keeps me cool.

Hope that helps.

I do HIIT and power lifting and I use a cooling vest, and sometimes neck collar to stay cool. I also drink a lot of water and use a wet towel on my face at times. I work out for about 20 minutes for HIIT and 1 hour for lifting.

This is an irritation for me too. After only about ten minutes into a workout, the tingling and numbness start to amp up more than usual, and by the end of the workout, my feet always feel webbed and my fingers are novacaine-like numb. And those are my least bothersome symptoms. The overheating seems to also really effect the vertigo/ dizziness and spasticity, and I often have moments of brain fog for an hour or so after exercising.

I always have lots of cold water nearby and exercise in air-conditioned rooms and/or with fans blowing on me (summer months/ hot weather outside is pretty impossible)- but the symptoms still creep up. Like psmd says, after a while you just learn to deal with the temporary symptoms and make adjustments where you can.

I've never tried a vest, but have found the cooling bands around my neck/ wrists (for me) to be more bothersome than they're worth. A friend recently mentioned hyper-evaporative cooling towels and cloths that are supposed to stay cool for 1 -4 hours after a simple soak in water. We do a lot of hiking, and she had recommended them for things like that, but I haven't tried them out yet. I think you can find them fairly inexpensively at places like ****s or Sports Authority- there are several different brands. Anyone else tried these?

Remember to use your local MS chapter for equipment! Each chapter has a set amount of funds to spend on members each year and a cooling vest is one of those things they offer. Also let your chapter know of other needs, they are there to help with improving the quality of their members lives. They are wonderful for keeping cool while taking walks and hikes. The vest that I had gotten a few years back was nicely form fitting, and light and you wore it under your clothing.

I have this problem as well. When I work out, or even when im just out in the heat for to long. I use ice packs to help keep me cool. I went and got some of those work out band you where on your head and arms, and I dipped them in water and then put them in the freezer, helps to keep me cool, and of course like everone said I drink lots of ice water

You can get gel filled neck wraps to put on during a workout, they help. But I find what is best is drink very cold Gatorade right after a workout....................cools me down a lot quicker than cold water.

I too overheat (MS). I found drinking water and working out in the evening or early morning. If it is too hot I go to my basement.
As for the cooling vest, I had one that I wore to Disney since it is too hot there. It was bulky and did not really work for me.
It was more of a pain.