1.0WAMUhttps://wamu.orgadminhttps://wamu.org/author/admin/rich600338<blockquote class="wp-embedded-content" data-secret="6LRV3y9RMV"><a href="https://wamu.org/story/14/03/27/marathon_training_lowers_heart_disease_risk_in_middle_aged_men/">Marathon Training Lowers Heart Disease Risk In Middle-Aged Men</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://wamu.org/story/14/03/27/marathon_training_lowers_heart_disease_risk_in_middle_aged_men/embed/#?secret=6LRV3y9RMV" width="600" height="338" title="“Marathon Training Lowers Heart Disease Risk In Middle-Aged Men” — WAMU" data-secret="6LRV3y9RMV" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,d){"use strict";var e=!1,o=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),l=0;l<n.length;l++)n[l].style.display="none";for(l=0;l<i.length;l++)if(r=i[l],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=d.createElement("a"),a=d.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,!o.test(a.protocol));else if(a.host===s.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> https://wamu.org/wp-content/uploads/2014/03/27/112298786_wide-a26aeb2c2289f4b1058f00464c98d50c87574057-1024x575.jpg1024575Marathons are increasingly popular with people who will never cross the finish line in under three hours. But do recreational runners benefit from the intense training? Researchers in Boston say yes.