1. a, b, c
  2. all except a and f
  3. African-American women, people with low education levels, people who are overweight and the elderly
  4. False. Children are heavier and less physically fit than they were even a generation ago.  Many are developing cardiovascular disease risk factors such as overweight, higher blood pressure, higher blood cholesterol and cigarette smoking.  Children spend an average of 17 hours a week watching TV in addition to the time they spend on video and computer games -- all sedentary activities!
  5. Not enough time.  But all it takes is 30 minutes a day and not necessarily all at once!  Your workout should have the same importance as any other appointment of the day.
  6. all
  7. True
  8. True. To build endurance, do aerobic physical activities such as brisk walking, running, bicycling or swimming.  To build strength, try weight lifting.  To improve flexibility, do stretching and movements that put each part of the body through its full range of motion.
  9. See a doctor first for a medical evaluation
  10. Walking.  It's inexpensive, easy and convenient.  You can walk throughout your lifetime.  You can walk year-round and in most weather, indoors or outdoors.  You don't need special clothing or equipment.  Walking is low impact so risks of injury to bones and joints are minimal.