This week, we will tell about a study linking activity on the sun to changes in Earth's climate.

VOA: special.2009.09.29

The total amount of activity should be spread over at least three days throughout the week.

VOA: special.2010.06.08

Ball says adults need at lease 150 minutes of moderate aerobic activity each week.

VOA: standard.2010.02.26

Looking gaunt from weight loss, the former television commentator returned to political activity this week.

CNN: Treasury transfers $12.6 million to Buchanan

Prisoners have at least 20 hours constructive activity a week, including education, group work, physical education and cooking.

ECONOMIST: Aid, democracy, rot

The BHF also advises 150 minutes of moderate intensity aerobic activity each week.

BBC: Quarter of adults walk just an hour a week, survey finds