{"version":"1.0","provider_name":"Promaker - Blog","provider_url":"https:\/\/promaker.eu\/blog","author_name":"Zesp\u00f3\u0142 Ekspert\u00f3w ProMaker","author_url":"https:\/\/promaker.eu\/blog\/author\/zespol-promaker\/","title":"Front lever: progresja, technika i plan | PROMAKER","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"R9USFFGOER\"><a href=\"https:\/\/promaker.eu\/blog\/front-lever\/\">Front lever: progresja krok po kroku i plan<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/promaker.eu\/blog\/front-lever\/embed\/#?secret=R9USFFGOER\" width=\"600\" height=\"338\" title=\"&#8222;Front lever: progresja krok po kroku i plan&#8221; &#8212; Promaker - Blog\" data-secret=\"R9USFFGOER\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\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:\/\/promaker.eu\/blog\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/promaker.eu\/blog\/wp-content\/uploads\/2026\/10\/front-lever-okladka-37fcdc3a.webp","thumbnail_width":1672,"thumbnail_height":941,"description":"Front lever krok po kroku: technika, sze\u015b\u0107 etap\u00f3w progresji, przyk\u0142adowy plan dw\u00f3ch trening\u00f3w tygodniowo, mi\u0119\u015bnie i poprawki b\u0142\u0119d\u00f3w."}