iFitness for iPhone

From Medical Productions:

Regular exercise is essential for becoming and staying fit. Experts recommend changing your workout routine regularly to keep your body from growing accustomed to the same old routine and to keep things interesting and enjoyable. Personal trainers can be costly though, and attempting a new exercise without assistance can lead to strain or an ineffective workout. iFitness for iPhone provides images of people performing over 180 exercises, sorted by body region or the exact muscle it targets. Simply choose a target, tap on an exercise, and you are presented with a picture of the exercise. Double tap to flip the image and reveal clearly worded instructions on the back - directing you step-by-step. You can even add exercises to your custom workout list, and make several workouts for different days of the week. Tap the log icon and easily record your progress. Your data is saved and presented to you in an easy to understand form, and can be sent to your email with just one finger tap.