It seemed difficult at first because I kept trying with the Ipod strapped to leg. However, the IPOD will not pick up your reps like that. I kept reading the instructions and it seems the ipod needs to be at an angle. Therefore, you need to wear your ipod on your arm I would say anywhere past the elbow. When you start exercising make sure that your arms go at an angle slanted down when going down then bring your arms back up when coming up. I found easier to simply hold a 2lb weight in each hand. This gave me the angle I needed for the ipod to pick up on the movement. Once this was done, the system began counting and giving me the points I earned. I did my first set of 21 and when I was done I was sweating so this is a very good program. I can perform this exercise while at work. Each time, I transfer a customer I can easily do my squats since it takes a good minute and a half to transfer. Great program! You can't lose... one thing though... this is not the full application and you can only use it for a limited time but once you start you will not want to quit so the $2.99 for the real application is not bad at all.