此文之前有个研究,

For patients with established coronary heart disease (CHD)

• Mortality decreased by 30 per cent among women who exercised once a week compared to those who did not exercise at all. For men the corresponding figure was 20 per cent, states Trine Moholdt.

This study is unique because it includes women and older CHD patients with heart conditions. In fact women who exercise more than 30 minutes each time can decrease mortality by up to 50 per cent.

 

http://www.news-medical.net/news/2008/10/21/42090.aspx