Now your iPhone can help improve your health. Gyminee is an online fitness tracking application. Enter your current weight and desired weight. Choose your workout plan from a variety of options. Everything from weight lifting to walking and bicycling and now you have a web based workout log to view at the gym. Gyminee lets you view exercise videos and keep track of your progress from your iPhone. More details on the iPhone version is posted here
Try with TestiPhone
I tried this on my iPhone but it kept failing because the signal in my gym isn’t very good. This is a copy of FitSync which I’ve been using for a few years on my iPaq and Nokia. It’s OK and I like the videos but the problem is that if you don’t have a strong signal it won’t work so I prefer something like FitSync that you can sync and then use offline.