dr. tim johnson, >> exercise is something many too many of the messages about exercise are aimed at middle-aged people. a new study looks at women younger than 50 years old and found if these women got just two and a half hours of weekly exercise their risk of heart disease dropped up to 25%. researchers looked at 97 thousand women over a 20 year span and found moderate intensity exercise including brisk walking had a lower likelihood of heart issues. the number of times per week exercise didn't matter as long as they got two and a half hours. healthy diet, learning demanded stress. important step may be those they take on a treadmill. >> eating more unsaturated fat could be a life-saving decision. a new harvard study links greater consumption of saturated and trans fats with higher mortality rates. the chan school of public health report suggests replacing butter, lard and fat from red meat with plant based fats like olive and canola oil. the new date provides further support for the 2015 to 2020 federal dietary suggestions. maria: that processed food can be so tempting. next we take you live

tim kaine later in the broadcast. a new cnn poll shows donald trump pleading hillary clinton 44% to 39% in a four-way matchup. gary johnson received 9%. dr. jill stein receieived 3%. this comes as donald trump has defended donald ailes -- roger ailes, who has resigned amid multiple accusations of sexual harassment. this is donald trump speaking with msnbc's chuck todd. mr. trump: i don't want to comment, but he isis been a frid of mine for a lolong timime andi can tell you some of the womomen how are complaining, i knkn muchch he has helped them and dv recently, and d when they write locks that are fairly recently released and theyey say wonderfl things about him and now all of a suddenn to say t these horribe things about him, it is s very sad. hehe is a very good person. i have always found him toto bea very, very good person. by the way, a very, very talentnted person. look what he is done. i feel badly.. my campaign is doing pretty well. amy: about a dozen women have spoken to the "new york times" about experiencing sexual harassment at fox news. reporter said roger aiailes begn one and ended every meeting by hugging and kissing her.