article in;J Am Coll Cardiol. 2015;65(5):411-419 content.onlinejacc.org/article.aspx?articleID=2108914 and “Short Easy—Not Strenuous—Jogging Gives Biggest Survival Gain: Analysis” in
http://content.onlinejacc.org/article.aspx?articleID=2108914
Dose of Jogging and Long-Term Mortality The Copenhagen City Heart Study
and “Even a Little More Daily Activity May Reduce Mortality Levels”;http://www.medscape.com/viewarticle/838625 ;