{"id":110738,"date":"2026-07-14T07:18:10","date_gmt":"2026-07-14T05:18:10","guid":{"rendered":"https:\/\/www.infokuryr.cz\/n\/?p=110738"},"modified":"2026-07-14T07:18:10","modified_gmt":"2026-07-14T05:18:10","slug":"studie-upozornuje-ze-pri-prerusovanem-pustu-muzete-ztracet-nejen-tuk-ale-take-svalovou-hmotu","status":"publish","type":"post","link":"https:\/\/www.infokuryr.cz\/n\/2026\/07\/14\/studie-upozornuje-ze-pri-prerusovanem-pustu-muzete-ztracet-nejen-tuk-ale-take-svalovou-hmotu\/","title":{"rendered":"Studie upozor\u0148uje, \u017ee p\u0159i p\u0159eru\u0161ovan\u00e9m p\u016fstu m\u016f\u017eete ztr\u00e1cet nejen tuk, ale tak\u00e9 svalovou hmotu"},"content":{"rendered":"<div id=\"fb-root\"><\/div>\n<p><strong><span dir=\"auto\">\u00a0Mnoz\u00ed lid\u00e9 si vyb\u00edraj\u00ed p\u0159eru\u0161ovan\u00fd p\u016fst, proto\u017ee jim pom\u00e1h\u00e1 zhubnout bez neust\u00e1l\u00e9ho po\u010d\u00edt\u00e1n\u00ed kalori\u00ed. Nov\u00e1 systematick\u00e1 anal\u00fdza v\u0161ak upozor\u0148uje, \u017ee p\u0159i nespr\u00e1vn\u011b nastaven\u00e9m p\u016fstu nemus\u00ed t\u011blo p\u0159i hubnut\u00ed ztr\u00e1cet pouze tuk, ale tak\u00e9 \u010d\u00e1st svalov\u00e9 hmoty.<\/span><\/strong><\/p>\n<p><span dir=\"auto\">Na prvn\u00ed pohled se to nejev\u00ed jako velk\u00fd probl\u00e9m. Svaly v\u0161ak nepln\u00ed pouze pohybovou funkci. Hraj\u00ed d\u016fle\u017eitou roli p\u0159i regulaci hladiny cukru v krvi, ovliv\u0148uj\u00ed energetick\u00fd v\u00fddej organismu a jejich \u00fabytek pat\u0159\u00ed mezi faktory spojen\u00e9 s hor\u0161\u00edm metabolick\u00fdm zdrav\u00edm ve vy\u0161\u0161\u00edm v\u011bku.<\/span><\/p>\n<p><span dir=\"auto\">Na tyto souvislosti upozor\u0148uje systematick\u00fd p\u0159ehled a metaanal\u00fdza publikovan\u00e1 v \u010dasopise\u00a0<\/span><em><span dir=\"auto\">Nutrients<\/span><\/em><span dir=\"auto\">\u00a0, kter\u00e1 zahrnovala 20 klinick\u00fdch studi\u00ed s celkem 1 288 dosp\u011bl\u00fdmi s nadv\u00e1hou nebo obezitou.<\/span><\/p>\n<p><span dir=\"auto\">Auto\u0159i zjistili, \u017ee \u010dasov\u011b omezen\u00e9 stravov\u00e1n\u00ed (p\u0159eru\u0161ovan\u00fd p\u016fst) \u00fa\u010dinn\u011b sni\u017eovalo t\u011blesnou hmotnost i mno\u017estv\u00ed t\u011blesn\u00e9ho tuku. Sou\u010dasn\u011b zaznamenaly m\u00edrn\u00fd pokles beztukov\u00e9 t\u011blesn\u00e9 hmoty, kter\u00fd \u010dinil p\u0159ibli\u017en\u011b 17% z celkov\u00e9ho \u00fabytku hmotnosti.<\/span><\/p>\n<p><span dir=\"auto\">Beztukov\u00e1 t\u011blesn\u00e1 hmota (lean mass) v\u0161ak nen\u00ed toto\u017en\u00e1 jen se svalovou hmotou. Zahrnuje tak\u00e9 vodu, vnit\u0159n\u00ed org\u00e1ny, pojivov\u00e9 tk\u00e1n\u011b \u010di z\u00e1soby glykogenu, tak\u017ee \u010d\u00e1st zaznamenan\u00e9ho poklesu nemus\u00ed p\u0159edstavovat skute\u010dn\u00fd \u00fabytek svalov\u00fdch vl\u00e1ken.<\/span><\/p>\n<p><span dir=\"auto\">P\u0159i dlouhodob\u00e9m kalorick\u00e9m deficitu, n\u00edzk\u00e9m p\u0159\u00edjmu b\u00edlkovin a absenci silov\u00e9ho tr\u00e9ninku v\u0161ak m\u016f\u017ee organismus odbour\u00e1vat i svalovou tk\u00e1\u0148.<\/span><\/p>\n<p><span dir=\"auto\">To neznamen\u00e1, \u017ee p\u0159eru\u0161ovan\u00fd p\u016fst je s\u00e1m o sob\u011b \u0161kodliv\u00fd. Jedn\u00edm z hlavn\u00edch vysv\u011btlen\u00ed pozorovan\u00fdch zm\u011bn je ni\u017e\u0161\u00ed p\u0159\u00edjem energie a b\u00edlkovin. P\u0159i vhodn\u011b sestaven\u00e9m j\u00eddeln\u00ed\u010dku a pravideln\u00e9m silov\u00e9m tr\u00e9ninku se riziko ztr\u00e1ty svalov\u00e9 hmoty v\u00fdrazn\u011b sni\u017euje.<\/span><\/p>\n<h2><span dir=\"auto\">Pro\u010d p\u0159i kalorick\u00e9m deficitu ub\u00fdv\u00e1 i beztukov\u00e1 hmota<\/span><\/h2>\n<p><span dir=\"auto\">P\u0159i p\u0159eru\u0161ovan\u00e9m p\u016fstu lid\u00e9 obvykle jed\u00ed pouze b\u011bhem osmi a\u017e desetihodinov\u00e9ho \u010dasov\u00e9ho okna, co\u017e \u010dasto p\u0159irozen\u011b sni\u017euje celkov\u00fd p\u0159\u00edjem energie i b\u00edlkovin.<\/span><\/p>\n<p><span dir=\"auto\">Kdy\u017e organismus p\u0159ij\u00edm\u00e1 m\u00e9n\u011b energie, ne\u017e spot\u0159ebuje, nespaluje v\u00fdlu\u010dn\u011b tukov\u00e9 z\u00e1soby. T\u00e9m\u011b\u0159 p\u0159i ka\u017ed\u00e9m \u00fasp\u011b\u0161n\u00e9m hubnut\u00ed doch\u00e1z\u00ed ik ur\u010dit\u00e9mu \u00fabytku beztukov\u00e9 hmoty. Samotn\u00fd p\u0159eru\u0161ovan\u00fd p\u016fst proto pravd\u011bpodobn\u011b nen\u00ed hlavn\u00edm vin\u00edkem. Rozhoduj\u00edc\u00ed je, jestli \u010dlov\u011bk p\u0159ij\u00edm\u00e1 dostatek b\u00edlkovin a zda svaly pravideln\u011b zat\u011b\u017euje.<\/span><\/p>\n<p><span dir=\"auto\">Podobn\u00fd \u00fabytek lze pozorovat i p\u0159i jin\u00fdch reduk\u010dn\u00edch diet\u00e1ch. P\u0159eru\u0161ovan\u00fd p\u016fst je zp\u016fsobem stravov\u00e1n\u00ed, p\u0159i kter\u00e9m m\u016f\u017ee b\u00fdt obt\u00ed\u017en\u011bj\u0161\u00ed p\u0159ijmout dostatek b\u00edlkovin a vhodn\u011b rozlo\u017eit jejich p\u0159\u00edjem b\u011bhem dne.<\/span><\/p>\n<p><span dir=\"auto\">Auto\u0159i z\u00e1rove\u0148 upozor\u0148uj\u00ed, \u017ee \u010d\u00e1st poklesu beztukov\u00e9 hmoty pravd\u011bpodobn\u011b souvis\u00ed i se ztr\u00e1tou vody a glykogenu. Nen\u00ed proto spr\u00e1vn\u00e9 cel\u00fd zaznamenan\u00fd pokles automaticky pova\u017eovat za ztr\u00e1tu svalov\u00fdch vl\u00e1ken.<\/span><\/p>\n<p><span dir=\"auto\">Krat\u0161\u00ed okno k j\u00eddlu zt\u011b\u017euje p\u0159\u00edjem dostate\u010dn\u00e9ho mno\u017estv\u00ed kvalitn\u00edch b\u00edlkovin, zejm\u00e9na u lid\u00ed, kte\u0159\u00ed pravideln\u011b cvi\u010d\u00ed nebo jsou ve vy\u0161\u0161\u00edm v\u011bku.<\/span><\/p>\n<p><span dir=\"auto\">Zaj\u00edmav\u00e9 je, \u017ee ji\u017e po t\u0159ic\u00edtce \u010dlov\u011bk bez pravideln\u00e9ho silov\u00e9ho tr\u00e9ninku p\u0159irozen\u011b ztr\u00e1c\u00ed p\u0159ibli\u017en\u011b 3 a\u017e 8 % svalov\u00e9 hmoty za ka\u017ed\u00e9 desetilet\u00ed \u017eivota. Pokud se k tomu p\u0159id\u00e1 v\u00fdrazn\u00fd kalorick\u00fd deficit, tento proces se m\u016f\u017ee je\u0161t\u011b urychlit.<\/span><\/p>\n<h2><span dir=\"auto\">Koho se v\u00fdsledky t\u00fdkaj\u00ed nejv\u00edce<\/span><\/h2>\n<p><span dir=\"auto\">Tato zji\u0161t\u011bn\u00ed nemaj\u00ed stejn\u00fd v\u00fdznam pro ka\u017ed\u00e9ho. Nejv\u011bt\u0161\u00ed riziko p\u0159edstavuj\u00ed pro lidi, kte\u0159\u00ed ji\u017e maj\u00ed ni\u017e\u0161\u00ed pod\u00edl svalov\u00e9 hmoty nebo jsou n\u00e1chyln\u011bj\u0161\u00ed k jej\u00ed ztr\u00e1t\u011b.<\/span><\/p>\n<p><span dir=\"auto\">Jedn\u00e1 se zejm\u00e9na o:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">dosp\u011bl\u00e9 nad 40 a\u017e 50 let<\/span><\/li>\n<li><span dir=\"auto\">seniory, u kter\u00fdch p\u0159irozen\u011b ub\u00fdv\u00e1 svalov\u00e1 hmota<\/span><\/li>\n<li><span dir=\"auto\">lid\u00ed s velk\u00fdm kalorick\u00fdm deficitem<\/span><\/li>\n<li><span dir=\"auto\">osoby, kter\u00e9 necvi\u010d\u00ed silov\u011b<\/span><\/li>\n<li><span dir=\"auto\">lid\u00ed p\u0159ij\u00edmaj\u00edc\u00edch m\u00e1lo b\u00edlkovin<\/span><\/li>\n<\/ul>\n<p><span dir=\"auto\">Naopak, u fyzicky aktivn\u00edch lid\u00ed s dostate\u010dn\u00fdm p\u0159\u00edjmem b\u00edlkovin a pravideln\u00fdm silov\u00fdm tr\u00e9ninkem je riziko podstatn\u011b ni\u017e\u0161\u00ed.<\/span><\/p>\n<h2><span dir=\"auto\">Pro\u010d jsou b\u00edlkoviny tak d\u016fle\u017eit\u00e9<\/span><\/h2>\n<p><span dir=\"auto\">Svaly se neust\u00e1le obnovuj\u00ed prost\u0159ednictv\u00edm procesu zvan\u00e9ho synt\u00e9za svalov\u00fdch b\u00edlkovin (muscle protein synthesis \u2013 MPS). Ka\u017ed\u00e9 j\u00eddlo s dostate\u010dn\u00fdm obsahem kvalitn\u00edch b\u00edlkovin tento proces aktivuje a pom\u00e1h\u00e1 opravovat i budovat svalovou tk\u00e1\u0148.<\/span><\/p>\n<p><span dir=\"auto\">Kl\u00ed\u010dovou roli p\u0159itom hraje aminokyselina leucin, kter\u00e1 funguje jako hlavn\u00ed sign\u00e1l ke spu\u0161t\u011bn\u00ed tvorby nov\u00fdch svalov\u00fdch b\u00edlkovin.<\/span><\/p>\n<p><span dir=\"auto\">V\u00fdzkumy nazna\u010duj\u00ed, \u017ee rozd\u011blen\u00ed denn\u00edho p\u0159\u00edjmu b\u00edlkovin do v\u00edce j\u00eddel podporuje tvorbu svalov\u00fdch b\u00edlkovin \u00fa\u010dinn\u011bji ne\u017e jejich konzumace pouze jednou nebo dvakr\u00e1t denn\u011b ve velk\u00fdch d\u00e1vk\u00e1ch. P\u0159i velmi kr\u00e1tk\u00e9m okn\u011b k j\u00eddlu se proto po\u010det p\u0159\u00edle\u017eitost\u00ed ke stimulaci tohoto procesu p\u0159irozen\u011b sni\u017euje.<\/span><\/p>\n<p><span dir=\"auto\">S p\u0159ib\u00fdvaj\u00edc\u00edm v\u011bkem nav\u00edc svaly reaguj\u00ed na b\u00edlkoviny m\u00e9n\u011b citliv\u011b. Proto star\u0161\u00ed lid\u00e9 \u010dasto pot\u0159ebuj\u00ed jejich vy\u0161\u0161\u00ed p\u0159\u00edjem, aby dos\u00e1hli stejn\u00e9ho efektu.<\/span><\/p>\n<h2><span dir=\"auto\">Silov\u00fd tr\u00e9nink m\u016f\u017ee v\u00fdrazn\u011b zm\u011bnit v\u00fdsledek<\/span><\/h2>\n<p><span dir=\"auto\">Auto\u0159i anal\u00fdzy upozor\u0148uj\u00ed, \u017ee jedn\u00edm z nej\u00fa\u010dinn\u011bj\u0161\u00edch zp\u016fsob\u016f ochrany svalov\u00e9 hmoty b\u011bhem hubnut\u00ed z\u016fst\u00e1v\u00e1 pravideln\u00fd silov\u00fd tr\u00e9nink, o kter\u00e9m jsme psali v na\u0161em\u00a0<\/span><a href=\"https:\/\/www.badatel.net\/dve-cvicenia-ktore-posobia-na-jednu-z-hlavnych-pricin-vacsiny-chronickych-ochoreni\/\"><span dir=\"auto\">p\u0159edchoz\u00edm \u010dl\u00e1nku<\/span><\/a><span dir=\"auto\">\u00a0.<\/span><\/p>\n<p><span dir=\"auto\">Velk\u00fd v\u00fdznam m\u00e1 tak\u00e9 na\u010dasov\u00e1n\u00ed j\u00eddla. Pokud po intenzivn\u00edm tr\u00e9ninku n\u00e1sleduje je\u0161t\u011b n\u011bkolikahodinov\u00fd p\u016fst, svaly z\u016fst\u00e1vaj\u00ed d\u00e9le bez aminokyselin pot\u0159ebn\u00fdch k regeneraci. Praktick\u00e9 proto b\u00fdv\u00e1 za\u0159adit tr\u00e9nink t\u011bsn\u011b p\u0159ed za\u010d\u00e1tek okna k j\u00eddlu nebo kr\u00e1tce po jeho otev\u0159en\u00ed.<\/span><\/p>\n<p><span dir=\"auto\">Nen\u00ed v\u0161ak t\u0159eba usilovat o dokonal\u00e9 na\u010dasov\u00e1n\u00ed. Mnohem d\u016fle\u017eit\u011bj\u0161\u00ed je p\u0159ijmout b\u011bhem dne dostatek kvalitn\u00edch b\u00edlkovin rozd\u011blen\u00fdch do v\u00edce j\u00eddel.<\/span><\/p>\n<p><span dir=\"auto\">Zaj\u00edmav\u00e9 je, \u017ee u\u017e dva a\u017e t\u0159i silov\u00e9 tr\u00e9ninky t\u00fddn\u011b dok\u00e1\u017e\u00ed v\u00fdrazn\u011b zpomalit p\u0159irozen\u00fd \u00fabytek svalov\u00e9 hmoty a z\u00e1rove\u0148 zlep\u0161it citlivost organizmu na inzul\u00edn.<\/span><\/p>\n<h2><span dir=\"auto\">Jak b\u011bhem p\u0159eru\u0161ovan\u00e9ho p\u016fstu chr\u00e1nit svalovou hmotu<\/span><\/h2>\n<p><span dir=\"auto\">Pro ochranu svalov\u00e9 hmoty se p\u0159idr\u017eujte n\u00e1sleduj\u00edc\u00edch doporu\u010den\u00ed:<\/span><\/p>\n<ul>\n<li><span dir=\"auto\">p\u0159ij\u00edmejte dostatek kvalitn\u00edch b\u00edlkovin<\/span><\/li>\n<li><span dir=\"auto\">nevolte p\u0159\u00edli\u0161 velk\u00fd kalorick\u00fd deficit<\/span><\/li>\n<li><span dir=\"auto\">silov\u011b tr\u00e9nujte 2 a\u017e 3kr\u00e1t t\u00fddn\u011b<\/span><\/li>\n<li><span dir=\"auto\">po tr\u00e9ninku za\u0159a\u010fte j\u00eddlo bohat\u00e9 na b\u00edlkoviny<\/span><\/li>\n<li><span dir=\"auto\">dop\u0159ejte si dostatek sp\u00e1nku<\/span><\/li>\n<\/ul>\n<h2><span dir=\"auto\">Je krat\u0161\u00ed obdob\u00ed p\u016fstu lep\u0161\u00edm \u0159e\u0161en\u00edm?<\/span><\/h2>\n<p><span dir=\"auto\">M\u00edrn\u011bj\u0161\u00ed re\u017eim s p\u0159ibli\u017en\u011b 10-12hodinov\u00fdm oknem k j\u00eddlu m\u016f\u017ee b\u00fdt pro mnoho lid\u00ed prakti\u010dt\u011bj\u0161\u00ed, proto\u017ee usnad\u0148uje p\u0159ijet\u00ed dostate\u010dn\u00e9ho mno\u017estv\u00ed energie a b\u00edlkovin.<\/span><\/p>\n<p><span dir=\"auto\">Ze samotn\u00e9 metaanal\u00fdzy v\u0161ak nelze jednozna\u010dn\u011b vyvodit, \u017ee p\u0159in\u00e1\u0161\u00ed stejn\u00fd \u00fa\u010dinek na sni\u017eov\u00e1n\u00ed t\u011blesn\u00e9ho tuku jako krat\u0161\u00ed re\u017eimy k j\u00eddlu.<\/span><\/p>\n<p><span dir=\"auto\">Rozhoduj\u00edc\u00ed z\u016fst\u00e1v\u00e1 celkov\u00e1 kvalita stravy, dostatek b\u00edlkovin a pravideln\u00e1 pohybov\u00e1 aktivita.<\/span><\/p>\n<h2><span dir=\"auto\">Z\u00e1v\u011br: Rozhoduje zp\u016fsob, jak\u00fdm p\u016fst praktikujete<\/span><\/h2>\n<p><span dir=\"auto\">Systematick\u00fd p\u0159ehled nazna\u010duje, \u017ee p\u0159eru\u0161ovan\u00fd p\u016fst m\u016f\u017ee b\u00fdt \u00fa\u010dinn\u00fdm n\u00e1strojem pro redukci hmotnosti. Z\u00e1rove\u0148 ale p\u0159ipom\u00edn\u00e1, \u017ee \u00fasp\u011b\u0161n\u00e9 hubnut\u00ed by se nem\u011blo hodnotit pouze podle \u010d\u00edsla na v\u00e1ze.<\/span><\/p>\n<p><span dir=\"auto\">Pokud b\u011bhem hubnut\u00ed ztr\u00e1c\u00edte p\u0159\u00edli\u0161 mnoho svalov\u00e9 hmoty, m\u016f\u017ee to z dlouhodob\u00e9ho hlediska zhor\u0161it va\u0161e metabolick\u00e9 zdrav\u00ed, fyzickou v\u00fdkonnost i kvalitu \u017eivota ve vy\u0161\u0161\u00edm v\u011bku.<\/span><\/p>\n<p><span dir=\"auto\">Dobrou zpr\u00e1vou je, \u017ee tomu lze ve velk\u00e9 m\u00ed\u0159e p\u0159edej\u00edt.<\/span><\/p>\n<p><span dir=\"auto\">Dostate\u010dn\u00fd p\u0159\u00edjem kvalitn\u00edch b\u00edlkovin, pravideln\u00fd silov\u00fd tr\u00e9nink a p\u0159im\u011b\u0159en\u00fd kalorick\u00fd deficit ve velk\u00e9 m\u00ed\u0159e rozhoduj\u00ed o tom, zda p\u0159eru\u0161ovan\u00fd p\u016fst bude v\u00e9st p\u0159ev\u00e1\u017en\u011b k \u00fabytku tuku nebo i svalov\u00e9 hmoty. Pr\u00e1v\u011b zp\u016fsob, jak\u00fdm p\u016fst praktikujete, je proto d\u016fle\u017eit\u011bj\u0161\u00ed ne\u017e samotn\u00e1 d\u00e9lka p\u016fstu.<\/span><\/p>\n<p><span dir=\"auto\">Autor: Petra Stone, Zdroj:\u00a0<\/span><a href=\"https:\/\/www.naturalnews.com\/2026-07-11-study-intermittent-fasting-linked-to-lean-muscle-loss.html\"><span dir=\"auto\">naturalnews.com<\/span><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0Mnoz\u00ed lid\u00e9 si vyb\u00edraj\u00ed p\u0159eru\u0161ovan\u00fd p\u016fst, proto\u017ee jim pom\u00e1h\u00e1 zhubnout bez neust\u00e1l\u00e9ho po\u010d\u00edt\u00e1n\u00ed kalori\u00ed. Nov\u00e1&#8230;<\/p>\n","protected":false},"author":2,"featured_media":110739,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[2581,3218,21],"_links":{"self":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/110738"}],"collection":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/comments?post=110738"}],"version-history":[{"count":0,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/110738\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media\/110739"}],"wp:attachment":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media?parent=110738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/categories?post=110738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/tags?post=110738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}