Not an exciting update. I can never remember where I put this, so I'm putting it here. Basic public health, physical activity guidelines:
http://circ.ahajournals.org/cgi/repr...AHA.107.185649
http://www.cdc.gov/physicalactivity/...es/adults.html
Summary:
150 min moderate -or- 75 min vigorous activity per week. Mix and match. Double it for increased benefits.