Depends on where you're walking. Sounds like it could be risky to walk outside, depending on how bad your vision gets. When I walk my dog I try to take it easy and avoid my tendency to walk briskly as this will affect my vision and makes me uneasy when I'm out of the house. I'll walk about 1/2 to 3/4 of an hour; usually by the halfway point my legs are like Jello. The more briskly I walk, the worse my eyes and legs get. On the treadmill, I can put in more of an effort and get a better aerobic benefit, with th safety of even footing and side bars on the treadmill for balance when I need them. Sometimes I have to stop after 15 minutes or so if I get too hot, so I cool off for a while and get back on. I'd like to get back to 45 mins / day, so far after 30 minutes I've got to stop. By then the paresthesia is so uncomfortable it literally makes me feel nauseous.
I love the elliptical. I find it easier on my body. I tend to ignore the vision issues related to exercise as they will return to normal for me in a few hours. I drink a lot of cold water and that seems to help too.
I am out of shape right now so I am going ot start slow. I am considering mixing it up a bit more though --- swimming, yoga, ellitpical, strength training.
They recommend swimming as it keeps your core temperature lower and is both a good cardio and resistance training.
I love yoga too --- it is suppose to really be the best for MS as it strengthens and stretches.
I am struggling a bit with tremor's this last week so I think I am going to do my exercises in spurts like DV says. 15 minutes of cardio followed by 30 minutes of strength training then 15 minutes of cardio again then 30 minutes of strength moves. This would allow my body the full benefit of a solid work out without getting my temperature up too high.
Once I have built up some endurance and strength, I'll work on a full class. I am not strong enough right now I don't think.
I second the yoga recommendation. It's amazing how much you can get done without breaking a sweat when you do yoga. It's very easy on the joints, too.
If you have Netflix, I would like to recommend "Crunch: Candlelight Yoga" with a lady named Sara Ivanhoe. It's super-relaxing and a great workout. If you have le'Hermitte's, you'll have to make some adjustments, but it's a great routine and you can stream it on Netflix so you don't have to get the DVD.
Water areobics is a good option, the water can keep you cool and it is less stress on your body.
Also there is the stationary bike thing that sits on the floor while you sit on a chair or your couch and you can peddle that or even put it on a table and do your arms instead of legs.
I had this issue too, when I get heated my symptoms get so much worse and I had to find ways around it. I don't do water aerobics because I live too far away from gyms to go on a regular basis but I do have the exercise bike thing and use that. I also have a treadmill and get in what I can on that but when I start to feel the need to stop I do because I listen to my body.
Yogo sounds like a great option too, people have mentioned it to me but I have yet to try it.