{"id":47625,"date":"2026-10-26T04:21:08","date_gmt":"2026-10-26T04:21:08","guid":{"rendered":"https:\/\/www.worldclock.com\/kalkulacka-jet-lag\/"},"modified":"2026-10-26T04:21:08","modified_gmt":"2026-10-26T04:21:08","slug":"kalkulacka-jet-lag","status":"publish","type":"page","link":"https:\/\/www.worldclock.com\/cs\/kalkulacka-jet-lag\/","title":{"rendered":"Kalkula\u010dka jet lagu"},"content":{"rendered":"<div class=\"wc wc-tool-page wc-tool-page--jetlag\"><header class=\"wc-thero\"><div class=\"wc-thero__text\"><nav class=\"wc-crumbs\" aria-label=\"Breadcrumb\"><ol><li><a href=\"https:\/\/www.worldclock.com\/cs\/\">Sv\u011btov\u00fd \u010das<\/a><\/li><li><a href=\"https:\/\/www.worldclock.com\/cs\/nastroje\/\">\u010casov\u00e9 n\u00e1stroje<\/a><\/li><li><span aria-current=\"page\">Kalkula\u010dka jet lagu<\/span><\/li><\/ol><\/nav><p class=\"wc-eyebrow\"><span aria-hidden=\"true\">\u2708\ufe0f<\/span> N\u00e1stroj zdarma<\/p><h1 class=\"wc-thero__title\">Kalkula\u010dka jet lagu<\/h1><p class=\"wc-thero__lead\">Zadejte, odkud a kam let\u00edte, a z\u00edskejte pl\u00e1n na ka\u017ed\u00fd den: kdy sp\u00e1t, kdy vyhled\u00e1vat sv\u011btlo a kdy se mu vyhnout.<\/p><\/div><\/header><div class=\"wc-tool\"><div class=\"wc-jet\" data-wc-tool=\"jetlag\" data-from=\"{&quot;n&quot;:&quot;Lond\\u00fdn&quot;,&quot;t&quot;:&quot;Europe\\\/London&quot;,&quot;f&quot;:&quot;gb&quot;}\" data-to=\"{&quot;n&quot;:&quot;Bangkok&quot;,&quot;t&quot;:&quot;Asia\\\/Bangkok&quot;,&quot;f&quot;:&quot;th&quot;}\"><div class=\"wc-jet__form\"><div class=\"wc-field\"><span>Odlet z<\/span><div class=\"wc-jet__city\" data-city=\"from\"><\/div><div class=\"wc-search wc-search--tool\" data-wc-search data-mode=\"add\" data-side=\"from\"><input type=\"search\" placeholder=\"Zm\u011bnit m\u011bsto odletu\u2026\" aria-label=\"Zm\u011bnit m\u011bsto odletu\u2026\" autocomplete=\"off\"><ul class=\"wc-search__results\" hidden><\/ul><\/div><\/div><div class=\"wc-field\"><span>P\u0159\u00edlet do<\/span><div class=\"wc-jet__city\" data-city=\"to\"><\/div><div class=\"wc-search wc-search--tool\" data-wc-search data-mode=\"add\" data-side=\"to\"><input type=\"search\" placeholder=\"Zm\u011bnit c\u00edl\u2026\" aria-label=\"Zm\u011bnit c\u00edl\u2026\" autocomplete=\"off\"><ul class=\"wc-search__results\" hidden><\/ul><\/div><\/div><label class=\"wc-field\"><span>Datum p\u0159\u00edletu<\/span><input type=\"date\" data-date><\/label><label class=\"wc-field\"><span>Obvykle sp\u00edte<\/span><select data-sleep><option value=\"22\">22:00 \u2013 06:00<\/option><option value=\"23\" selected>23:00 \u2013 07:00<\/option><option value=\"0\">00:00 \u2013 08:00<\/option><option value=\"1\">01:00 \u2013 09:00<\/option><\/select><\/label><\/div><div class=\"wc-jet__result\" data-result><\/div><div class=\"wc-jet__plan\" data-plan><\/div><p class=\"wc-tnote\">Jde o obecn\u00e1 doporu\u010den\u00ed zalo\u017een\u00e1 na tom, jak vnit\u0159n\u00ed hodiny reaguj\u00ed na sv\u011btlo, nikoli o l\u00e9ka\u0159skou radu. P\u0159ed u\u017eit\u00edm melatoninu nebo l\u00e9k\u016f na span\u00ed se pora\u010fte s l\u00e9ka\u0159em.<\/p><\/div><\/div><section class=\"wc-section wc-tool-info\"><div class=\"wc-prose\"><h2>Jak funguje pl\u00e1n proti jet lagu<\/h2><p>Jet lag vznik\u00e1 proto, \u017ee va\u0161e vnit\u0159n\u00ed hodiny (cirkadi\u00e1nn\u00ed rytmus) z\u016fst\u00e1vaj\u00ed po p\u0159ist\u00e1n\u00ed na dom\u00e1c\u00edm \u010dase. Posouvaj\u00ed se zhruba o <strong>1 hodinu denn\u011b p\u0159i letu na v\u00fdchod<\/strong> a asi o <strong>1,5 hodiny denn\u011b p\u0159i letu na z\u00e1pad<\/strong> \u2013 proto b\u00fdv\u00e1 let na v\u00fdchod obvykle hor\u0161\u00ed.<\/p><p>Sv\u011btlo je nejsiln\u011bj\u0161\u00edm sign\u00e1lem pro se\u0159\u00edzen\u00ed vnit\u0159n\u00edch hodin. Sv\u011btlo v hodin\u00e1ch <em>po<\/em> bodu nejni\u017e\u0161\u00ed t\u011blesn\u00e9 teploty (asi dv\u011b hodiny p\u0159ed obvykl\u00fdm probuzen\u00edm) posouv\u00e1 hodiny d\u0159\u00edve; sv\u011btlo v hodin\u00e1ch <em>p\u0159ed<\/em> n\u00edm je posouv\u00e1 pozd\u011bji. Pl\u00e1n v\u00fd\u0161e na\u010dasuje sv\u011btlo a tmu tak, aby se va\u0161e hodiny posouvaly spr\u00e1vn\u00fdm sm\u011brem \u2013 a upozorn\u00ed v\u00e1s, kdy\u017e by rann\u00ed sv\u011btlo po dlouh\u00e9m letu na v\u00fdchod posunulo hodiny opa\u010dn\u011b.<\/p><h2>Rychl\u00e9 tipy<\/h2><ul><li>2\u20133 dny p\u0159ed odletem posouvejte dobu sp\u00e1nku ka\u017ed\u00fd den o hodinu sm\u011brem k \u010dasu v c\u00edlov\u00e9 destinaci.<\/li><li>V letadle pijte vodu a omezte alkohol a kofein.<\/li><li>Po p\u0159\u00edletu jezte podle m\u00edstn\u00edho \u010dasu a zd\u0159\u00edmn\u011bte si nanejv\u00fd\u0161 na 30 minut.<\/li><\/ul><\/div><\/section><section class=\"wc-section wc-faq\"><h2>\u010cast\u00e9 dotazy<\/h2><details><summary>Jak dlouho trv\u00e1 jet lag?<\/summary><p>Orienta\u010dn\u011b asi jeden den na ka\u017ed\u00e9 p\u0159ekro\u010den\u00e9 \u010dasov\u00e9 p\u00e1smo p\u0159i letu na v\u00fdchod a o n\u011bco m\u00e9n\u011b \u2013 kolem dvou dn\u016f na ka\u017ed\u00e1 t\u0159i \u010dasov\u00e1 p\u00e1sma \u2013 p\u0159i letu na z\u00e1pad.<\/p><\/details><details><summary>Je jet lag hor\u0161\u00ed p\u0159i letu na v\u00fdchod, nebo na z\u00e1pad?<\/summary><p>Na v\u00fdchod. P\u0159i letu na v\u00fdchod mus\u00edte usnout d\u0159\u00edve, ne\u017e t\u011blo chce, a vnit\u0159n\u00ed hodiny se posouvaj\u00ed dop\u0159edu pomaleji ne\u017e dozadu.<\/p><\/details><details><summary>Vznik\u00e1 jet lag i p\u0159i letech ze severu na jih?<\/summary><p>Ne. Jet lag vznik\u00e1 p\u0159ekra\u010dov\u00e1n\u00edm \u010dasov\u00fdch p\u00e1sem. Dlouh\u00fd let z Evropy do Jihoafrick\u00e9 republiky zp\u016fsob\u00ed \u00fanavu, ale jen mal\u00fd nebo \u017e\u00e1dn\u00fd jet lag, proto\u017ee \u010dasov\u00fd posun je jen hodina \u010di dv\u011b.<\/p><\/details><\/section><section class=\"wc-section wc-tools-grid\"><div class=\"wc-section__head\"><h2>Dal\u0161\u00ed \u010dasov\u00e9 n\u00e1stroje zdarma<\/h2><a href=\"https:\/\/www.worldclock.com\/cs\/nastroje\/\">V\u0161echny n\u00e1stroje \u2192<\/a><\/div><div class=\"wc-toolcards\"><a class=\"wc-toolcard wc-toolcard--hours\" href=\"https:\/\/www.worldclock.com\/cs\/kalkulacka-hodin\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\u231b<\/span><span class=\"wc-toolcard__name\">Kalkula\u010dka hodin<\/span><span class=\"wc-toolcard__desc\">Hodiny mezi dv\u011bma \u010dasy.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--timecard\" href=\"https:\/\/www.worldclock.com\/cs\/kalkulacka-dochazky\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\uddc2\ufe0f<\/span><span class=\"wc-toolcard__name\">Kalkula\u010dka doch\u00e1zky<\/span><span class=\"wc-toolcard__desc\">T\u00fddenn\u00ed hodiny, p\u0159es\u010dasy a mzda.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--decimal\" href=\"https:\/\/www.worldclock.com\/cs\/prevod-na-desetinne-hodiny\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd22<\/span><span class=\"wc-toolcard__name\">P\u0159evodn\u00edk desetinn\u00e9ho \u010dasu<\/span><span class=\"wc-toolcard__desc\">Hodiny:minuty \u21c4 desetinn\u011b.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--pomodoro\" href=\"https:\/\/www.worldclock.com\/cs\/pomodoro-casovac\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf45<\/span><span class=\"wc-toolcard__name\">Pomodoro \u010dasova\u010d<\/span><span class=\"wc-toolcard__desc\">25minutov\u00e9 bloky soust\u0159ed\u011bn\u00ed.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--sleep\" href=\"https:\/\/www.worldclock.com\/cs\/spankova-kalkulacka\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\ude34<\/span><span class=\"wc-toolcard__name\">Sp\u00e1nkov\u00e1 kalkula\u010dka<\/span><span class=\"wc-toolcard__desc\">Nejlep\u0161\u00ed \u010das na sp\u00e1nek a probuzen\u00ed.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--markets\" href=\"https:\/\/www.worldclock.com\/cs\/oteviraci-doba-burz\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udcc8<\/span><span class=\"wc-toolcard__name\">Otev\u00edrac\u00ed doba burz a pracovn\u00ed doba<\/span><span class=\"wc-toolcard__desc\">Je trh pr\u00e1v\u011b otev\u0159en\u00fd?<\/span><\/a><a class=\"wc-toolcard wc-toolcard--bell\" href=\"https:\/\/www.worldclock.com\/cs\/odpocet-otevreni-burzy\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd14<\/span><span class=\"wc-toolcard__name\">Odpo\u010det do otev\u0159en\u00ed burzy<\/span><span class=\"wc-toolcard__desc\">Odpo\u010det do zahajovac\u00edho zvonku.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--converter\" href=\"https:\/\/www.worldclock.com\/cs\/prevodnik-casovych-pasem\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd01<\/span><span class=\"wc-toolcard__name\">P\u0159evodn\u00edk \u010dasov\u00fdch p\u00e1sem<\/span><span class=\"wc-toolcard__desc\">P\u0159eve\u010fte \u010das mezi libovoln\u00fdmi m\u011bsty.<\/span><\/a><\/div><\/section><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":"","bs_cache_bypass_cache":0,"bs_cache_related_page":0},"class_list":["post-47625","page","type-page","status-publish","hentry"],"acf":[],"taxonomy_info":[],"featured_image_src_large":false,"author_info":{"display_name":"clocker","author_link":"https:\/\/www.worldclock.com\/cs\/author\/clocker\/"},"comment_info":"","_links":{"self":[{"href":"https:\/\/www.worldclock.com\/cs\/wp-json\/wp\/v2\/pages\/47625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.worldclock.com\/cs\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.worldclock.com\/cs\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.worldclock.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.worldclock.com\/cs\/wp-json\/wp\/v2\/comments?post=47625"}],"version-history":[{"count":0,"href":"https:\/\/www.worldclock.com\/cs\/wp-json\/wp\/v2\/pages\/47625\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.worldclock.com\/cs\/wp-json\/wp\/v2\/media?parent=47625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}