Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Is this belt manuel or motorized?
Document: This treadmill is absolutely wonderful. The price was great and it is very heavy and steady. Just a word of caution, ladies please have a man move it around for you to prevent any injuries. This is the next best thing to a motorized treadmill. I highly recommend it.
I wanted a manual treadmill that works. The room I set up as my workout room is quite small and I wanted other stations set up, not just the treadmill (a dumbbell bench and upright exercise bike). Most motorized treadmills are huge and would have required giving up one of the other stations. However, if you read the reviews, most manual treadmills don't really work very well.
I walk a lot. I lift a lot. But on a cardiovascular level, I don't get the sort of workout a treadmill (or elliptical bike or motorized treadmill) offers. I ditched my huge, loud, motorized, so-big-it-requires-its-own-room treadmill, and I bought this thing. That was a mistake. Cons: While the magnetic mechanism probably has the capacity to be a smooth-running thing, this one isn't.
It's well-built, sturdy, and was reasonably easy to assemble. The size is perfect for limited space environments, and it folds up nicely for storage. It's a manual treadmill so it does provide a bit more of a workout than a motorized version. As others have noted, raising the back an inch or so with blocks may make it more comfortable to use although I think the same effect can be obtained by using the dial. I am extremely pleased with my purchase, it gets daily use.
I find the motorized treadmill very unnatural. My preference is to walk outside whenever possible. I got this for cold and rainy weather, and also, for brief uses during the day (I work at home and sit a lot, so it is really a great thing to be able to take a break for 5 or 10 minutes and not have to get dressed to go outside for a short walk)2. Portability. It folds up quite easily and wheels over into the corner.
Belt kept sliding very hard to run on. I could not get the belt to center at all when walking on the belt.
Sturdy piece of equipment, but I am having trouble getting the belt to stay in the middle. This machine really works the butt!
I was very hopeful but this is a bad machine. The belt does not stay in place no matter what so you walk for 10 minutes and have to stop to roll it backwards to get it in place.
Absolutely awful. Regardless of the adjustments I made, after a couple of minutes,the belt would move off center, eventually making it impossible to use.
The treadmill belt slips out of place. I spent more time realigning it than I did using the product. Don't waste your money on this piece of junk. Sure wish I hadn't.
Answer: yes