Below I've put together a list of sites that are very informative and go into much more detail on nutrition and exercising. I strongly recommend visiting these other websites to get specific related content, enjoy.
Calorie Counter- Keep track of those good and bad calories you consume.
Fitness Advisor- Offers a variety of fitness regimes/training routines.
Medical Help- Helps you to keep tabs on your health and to stay informed.
Body Building-One of my favorites, it gives insight into building muscle as well as specific workout plans which work to your benefit.
Stretching- Despite the main purpose of this website, there are many details and tips regarding an important part of exercise, stretching.
Exercise Videos- A very innovative site which allows anyone to upload their own exercise video for others to use and benefit from.
Dietary Supplements- Provides a great deal of information concerning supplement use and safety.
Diet and Fitness- Much like Fitness Advisor with a bit more variety.
Exercise Movements- A comprehensive guide to proper weightlifting as well as an in depth view of exercises.