This post is also downloadable as a Word format handout. 

I blogged a couple of weeks ago on "Exercise 3: US Department of Health & Human Services, resources for assessment & advice" and quoted the fine 2008 "Physical activity guidelines for Americans" with its recommendation that - besides regular aerobic exercise - "People are encouraged - on at least two days per week - to strengthen the major muscle groups involving legs, hips, back, chest, stomach and shoulders.  Exercises for each muscle group should be repeated for 8 to 12 repetitions per session."

There are a series of interesting recent research studies here highlighting the drastic reduction in physical exercise taken by young people as they move into their teenage years, the fascinating pro