1.0FysioCityhttps://www.fysiocity.nl/en/rich600338<blockquote class="wp-embedded-content" data-secret="oyA1eRVKHQ"><a href="https://www.fysiocity.nl/en/sit-ups/">Sit ups</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.fysiocity.nl/en/sit-ups/embed/#?secret=oyA1eRVKHQ" width="600" height="338" title="“Sit ups” — FysioCity" data-secret="oyA1eRVKHQ" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !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); //# sourceURL=https://www.fysiocity.nl/wp-includes/js/wp-embed.min.js /* ]]> */ </script> Sit Ups The “Sit up” falls under the strength training and is usually performed with a view to strengthening the abdominal muscles. People first lie down with their backs on the floor, usually with their arms over their chest or behind their head and their knees bent. Then both the upper and lower vertebrae are [...]