7. Will it too hard or too easy for me to use?

7. Will it too hard or too easy for me to use? 
Some fitness products out there are incredibly challenging and completely unsuitable for beginners. In fact, one of the most popular infomercials, P90X, gives even the fittest people a challenge. On the other side, some other DVDs and products are much easier and would not be appropriate for a seasoned exerciser. Look closely at the moves and the exercises shown on TV and see if you can do them. If your knees start aching after a couple moves, it probably is not for you.