This really depends on which treadmill you end up buying. There are some excellent treadmills on the market for a cheap price with a very long warranty, meaning that you can expect your treadmill to last 25 years or more.
A good quality used treadmill can last a lifetime with proper care.
The Precor 9.31 treadmill is a well constructed machine with good horsepower and a excellent warranty. This is a very expensive machine but will last a long time. It is rated one of the top ten treadmill on the market at this time.
The best treadmills are currently made by NordicTrack, and will last for a very long time.
As long as you have the money to fix it.
about 2,000,000 more years
For 4 days only, don't expect much. With a really strict diet, and hitting that treadmill hard and long, maybe 3-4 pounds. Most of which will spring right back the next week.
The Sole F83 Treadmill (2009-2010 Model) has a five-star rating on amazon.com. It's expensive but it looks like a good model that will last you a long time!
No one ever wrote how long it was supposed to last but I am pretty sure they meant for it to last as long as the nation does.
If you don't roughly use or purposely abuse the Panasonic CuFt Countertop Microwave you can expect it to last between 3 to 5 years.
.24
In the first two weeks you will see the most weight loss and change, then after that it will slow down but not stop entirely as your body gets used to the workout.
Any kind of treadmill should last a long time and be really durable. So, I think that the treadmill you want should be a good alternative, and reading some review of the product might help, as well.