American College of Sports Medicine Fitness Website
The AmericanCollege of Sports
Medicine's (ACSM) website has excellent information regarding physical fitness is.
The organization has a related medical journal called Sports Medicine which is also very patient-friendly. The website provides free information which is balanced, evidence-based/scientific, and basically free of advertisements. Information is available on exercises, diet, and even supplements. Handouts can be downloaded, printed, and distributed.