The modern age comes with completely modern concerns. Nowadays the best investment is not necessarily the one that will make you spend the most money - rather, it is the one that will give you the best deal for your money. And an example of such an investment is a good exercise machine. If you're out to save, and at the same time get a good workout, you should look into tried and tested "budget" machines such as the Proform 820, the Cintura 2000, the Schwinn 430 and others.

If you are in doubt as to the efficiency of a machine, check out user reviews online. The ratio of satisfied and unsatisfied customers would be able to give you a hint about the kinds of machine you should buy. Following are just some of the most vital criteria for good exercise machines, like the Nordic Track CX 938, the Proform 820, etc:

1. Price. Elliptical machines come at a wide range of prices, but there's one thing you should know, if you're buying a machine for home use - home elliptical devices cost significantly less than commercial machines.

The difference in features and price range are vast enough so that properly functioning home machines should be affordable to almost anyone. If you're just buying a machine for home use, bear in mind that you probably don't need something that costs $5000! A reliable home-grade device that costs around $200-$500 should do the job, and this is exactly the price range that machines like the Proform 820 fall into.

2. Performance. All elliptical devices, or any kind of exercise machine, are tested for the strictest quality and safety standards, before they are sold commercially. This means you can rest assured that a brand-new exercise machine purchased from a reliable, certified source, can usually perform as advertised. However, not all elliptical machines are created equal!

Some come with additional features that will help you get more out of each workout session. Elliptical devices that have blood pressure monitors and calorie burn counters, for example, would be of better service to people whose constitutions are especially delicate, than devices that do not have those features.

It is also a medical fact that elliptical devices that have reverse directional movement can help you exercise even the muscles you would normally not exert when using regular ellipticals.

3. Reliability. Good exercise machines can take a lot of stress, and don't break down as soon as the warranty expires - or even earlier! It's not only a matter of warranty, although good service counts, of course. This is where brand comes in. Easily affordable machines like the Proform 820 and 900 are known for their durability.

Whether it's for repairs or tune-ups, you can count on having an expert to call. Getting a good deal on an exercise machine means never having to be in the dark about how to fix it or how to make sure it's running smoothly.