The American Heart Association presents a scientific position on physical exercise with a recommendation for thirty minutes of moderate exercise on most days. A physical activity calorie use chart shows the approximate calories spent per hour by a 100, 150, and 200 pound person doing a particular activity.

• Desk Exercise of the Day (Harvard)

Harvard Medical School’s consumer health site, Intelihealth, offers workplace exercises to relieve tension created by desk jobs.

• e-Health Library

Provides advice on creating an exercise program, avoiding sports injuries, staying motivated, and more.

• Exercise and Physical Fitness (MedlinePlus)

MedlinePlus brings together authoritative information from government agencies and health-related organizations on exercise and physical fitness. These sites were selected by librarians at the National Library of Medicine.

• Exercise Demos (Blue Cross Blue Shield of MN)

This site offers virtual demos to show the proper technique for a variety of exercises.

• Exercise for Children (MedlinePlus)

MedlinePlus brings together authoritative information from government agencies and health-related organizations on exercise for children. These sites were selected by librarians at the National Library of Medicine.

• Exercise for Seniors (MedlinePlus)

MedlinePlus brings together authoritative information from government agencies and health-related organizations on exercise for seniors. These sites were selected by librarians at the National Library of Medicine.

• Fitness (MayoClinic.com)

This site offers a fitness center featuring a collection of information and tools. Find fitness information and expert exercise advice on walking, sports nutrition, strength training, sports medicine and sports injuries.

• Interactive Healthy Eating Index and Physical Activity Tool (Center for Nutrition Policy and Promotion, U.S. Department of Agriculture)

The Interactive Healthy Eating Index (IHEI) is an online dietary assessment tool that provides information on your diet quality, related nutrition messages and links to nutrient information. The Physical Activity Tool, an addition to the IHEI, assesses your physical activity status and provides related energy expenditure information and educational messages. Use of this tool enhances the link between good nutrition and the health benefits of regular physical activity.

• Physical Activity for Everyone (CDC)

This site promotes participating in a fun physical activity for the health benefits that will follow.