pJust 30 minutes a day of moderate exercise--even walking--can save your life. This is the powerful message that Dr. JoAnn Manson--of the lead investigators of both the Women's Health Initiative and the Nurses' Health Study--and her coauthor Patricia Amend want to send to American women.ppRegardless of the barriers you may face--too busy, too tired, too down, or too old--with this four-step practical plan you'll find the excuses falling away and a happier, healthier self emerging. This book offers not only state-of-the-art information from recent medical research but step-by-step instructions on how to get started and maintain a physically active lifestyle. The authors will help you choose a core activity that doesn't disrupt your daily life. Then they will show you how to measure your fitness level at the start, how to monitor your progress over time, and how to reward yourself for your efforts. These four simple steps to fitness will work no matter who you are--25 or 75, harried moth