{"version":"1.0","provider_name":"Knee Hospitals","provider_url":"https:\/\/www.kneehospitals.com\/blog","author_name":"drknee","author_url":"https:\/\/www.kneehospitals.com\/blog\/author\/drknee\/","title":"Extension lag: Definition, Uses, and Clinical Overview - Knee Hospitals","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"ZhfbsinZTV\"><a href=\"https:\/\/www.kneehospitals.com\/blog\/extension-lag-definition-uses-and-clinical-overview\/\">Extension lag: Definition, Uses, and Clinical Overview<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.kneehospitals.com\/blog\/extension-lag-definition-uses-and-clinical-overview\/embed\/#?secret=ZhfbsinZTV\" width=\"600\" height=\"338\" title=\"&#8220;Extension lag: Definition, Uses, and Clinical Overview&#8221; &#8212; Knee Hospitals\" data-secret=\"ZhfbsinZTV\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.kneehospitals.com\/blog\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"Extension lag is a clinical finding where the knee cannot straighten fully by muscle effort. The key feature is that full straightening may be possible when someone else moves the knee for you. It is commonly discussed in knee exams, physical therapy notes, and post-surgical follow-ups. It helps describe how well the knee\u2019s \u201cextensor mechanism\u201d is working."}