{"id":1100,"date":"2026-07-15T14:25:18","date_gmt":"2026-07-15T14:25:18","guid":{"rendered":"https:\/\/enexia.be\/?p=1100"},"modified":"2026-07-15T14:25:19","modified_gmt":"2026-07-15T14:25:19","slug":"limpact-de-la-chaleur-estivale-sur-le-sommeil-que-faire-concretement","status":"publish","type":"post","link":"https:\/\/enexia.be\/index.php\/2026\/07\/15\/limpact-de-la-chaleur-estivale-sur-le-sommeil-que-faire-concretement\/","title":{"rendered":"L&#8217;impact de la chaleur estivale sur le sommeil : que faire concr\u00e8tement ?"},"content":{"rendered":"<p>Vous vous retournez dans votre lit depuis une heure. Il fait 27\u00b0C dans votre chambre, le soleil ne s&#8217;est couch\u00e9 qu&#8217;\u00e0 22h, et votre r\u00e9veil sonne dans six heures. Cette sc\u00e8ne, beaucoup d&#8217;entre nous la connaissent d\u00e8s le mois de juin. Et pourtant, peu de gens savent pourquoi la chaleur d\u00e9traque \u00e0 ce point notre sommeil \u2014 et surtout, comment y rem\u00e9dier efficacement. Quand les nuits chaudes perturbent votre repos, comprendre ce qui se passe dans votre corps est le premier pas pour retrouver un sommeil r\u00e9parateur.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Ce qui se passe dans votre corps quand il fait chaud<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pour s&#8217;endormir, votre corps doit abaisser sa temp\u00e9rature interne d&#8217;environ 1 \u00e0 2 degr\u00e9s. C&#8217;est une condition biologique fondamentale : c&#8217;est cette baisse thermique qui d\u00e9clenche la s\u00e9cr\u00e9tion de m\u00e9latonine, l&#8217;hormone qui pr\u00e9pare votre organisme au repos. En temps normal, ce processus s&#8217;enclenche naturellement en fin de journ\u00e9e. En \u00e9t\u00e9, deux obstacles viennent le bloquer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La m\u00e9latonine agit en abaissant la temp\u00e9rature corporelle via une vasodilatation des art\u00e8res p\u00e9riph\u00e9riques : le sang se refroidit par les extr\u00e9mit\u00e9s (mains, pieds), ce qui permet \u00e0 l&#8217;organisme de se pr\u00e9parer au repos. Lorsque la temp\u00e9rature ambiante est trop \u00e9lev\u00e9e, ce m\u00e9canisme est perturb\u00e9, allongeant le d\u00e9lai d&#8217;endormissement et fragilisant les phases de sommeil profond.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Le probl\u00e8me n\u00b01 : la chaleur ambiante.<\/strong> Une chambre \u00e0 plus de 20\u201322\u00b0C emp\u00eache votre corps d&#8217;\u00e9vacuer sa chaleur interne. R\u00e9sultat : vous tardez \u00e0 vous endormir, votre sommeil devient plus l\u00e9ger, et les r\u00e9veils nocturnes se multiplient.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Le probl\u00e8me n\u00b02 : la lumi\u00e8re tardive.<\/strong> En \u00e9t\u00e9, le soleil se couche parfois apr\u00e8s 22h en Europe de l&#8217;ouest. Or, la lumi\u00e8re \u2014 m\u00eame naturelle \u2014 bloque la production de m\u00e9latonine. Votre cerveau re\u00e7oit un signal contradictoire : il fait encore jour, ce n&#8217;est pas l&#8217;heure de dormir. Votre rythme circadien se d\u00e9cale, et l&#8217;endormissement recule.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">La temp\u00e9rature id\u00e9ale : un chiffre \u00e0 retenir<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Il est recommand\u00e9 de maintenir la chambre entre 16\u00b0C et 18\u00b0C pour un sommeil optimal. En dessous ou au-dessus, la qualit\u00e9 du repos diminue. En p\u00e9riode de canicule, descendre sous 22\u00b0C est d\u00e9j\u00e0 un objectif raisonnable sans climatisation.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"225\" loading=\"lazy\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-1024x225.png\" alt=\"Chaleur et sommeil\" class=\"wp-image-1110\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-1024x225.png 1024w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-300x66.png 300w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-770x169.png 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-293x64.png 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-1320x291.png 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31.png 1354w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><noscript><img decoding=\"async\" width=\"1024\" height=\"225\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-1024x225.png\" alt=\"Chaleur et sommeil\" class=\"wp-image-1110\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-1024x225.png 1024w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-300x66.png 300w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-770x169.png 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-293x64.png 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31-1320x291.png 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-14.40.31.png 1354w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Que faire concr\u00e8tement : 6 gestes efficaces<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" width=\"1024\" height=\"668\" loading=\"lazy\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-1024x668.png\" alt=\"\" class=\"wp-image-1116\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-1024x668.png 1024w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-300x196.png 300w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-770x502.png 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-293x191.png 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-1400x913.png 1400w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-1320x861.png 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55.png 1410w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><noscript><img decoding=\"async\" width=\"1024\" height=\"668\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-1024x668.png\" alt=\"\" class=\"wp-image-1116\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-1024x668.png 1024w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-300x196.png 300w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-770x502.png 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-293x191.png 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-1400x913.png 1400w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55-1320x861.png 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.12.55.png 1410w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"683\" height=\"1024\" loading=\"lazy\" data-id=\"1106\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-683x1024.jpg\" alt=\"Chaleur et sommeil\" class=\"wp-image-1106\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-683x1024.jpg 683w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-200x300.jpg 200w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-770x1155.jpg 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-1024x1536.jpg 1024w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-1365x2048.jpg 1365w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-293x440.jpg 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-1400x2100.jpg 1400w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-1320x1980.jpg 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-scaled.jpg 1707w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><noscript><img decoding=\"async\" width=\"683\" height=\"1024\" data-id=\"1106\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-683x1024.jpg\" alt=\"Chaleur et sommeil\" class=\"wp-image-1106\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-683x1024.jpg 683w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-200x300.jpg 200w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-770x1155.jpg 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-1024x1536.jpg 1024w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-1365x2048.jpg 1365w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-293x440.jpg 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-1400x2100.jpg 1400w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-1320x1980.jpg 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/karim-manjra-g6RraPICGrI-unsplash-scaled.jpg 1707w\" sizes=\"(max-width: 683px) 100vw, 683px\" \/><\/noscript><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"768\" height=\"1024\" loading=\"lazy\" data-id=\"1113\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-768x1024.jpg\" alt=\"Chaleur et sommeil\" class=\"wp-image-1113\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-768x1024.jpg 768w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-225x300.jpg 225w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-770x1027.jpg 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-1152x1536.jpg 1152w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-1536x2048.jpg 1536w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-293x391.jpg 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-1400x1867.jpg 1400w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-1320x1760.jpg 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-scaled.jpg 1920w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><noscript><img decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"1113\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-768x1024.jpg\" alt=\"Chaleur et sommeil\" class=\"wp-image-1113\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-768x1024.jpg 768w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-225x300.jpg 225w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-770x1027.jpg 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-1152x1536.jpg 1152w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-1536x2048.jpg 1536w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-293x391.jpg 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-1400x1867.jpg 1400w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-1320x1760.jpg 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/susan-wilkinson-nM5cl0rVXI-unsplash-scaled.jpg 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/noscript><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Votre rituel du soir en \u00e9t\u00e9 : un exemple concret<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Voici une routine simple \u00e0 adapter \u00e0 votre quotidien pour pr\u00e9parer votre corps au repos, m\u00eame quand il fait chaud :<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"469\" loading=\"lazy\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-1024x469.png\" alt=\"\" class=\"wp-image-1117\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-1024x469.png 1024w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-300x137.png 300w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-770x352.png 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-293x134.png 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-1400x641.png 1400w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-1320x604.png 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42.png 1416w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><noscript><img decoding=\"async\" width=\"1024\" height=\"469\" src=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-1024x469.png\" alt=\"\" class=\"wp-image-1117\" srcset=\"https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-1024x469.png 1024w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-300x137.png 300w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-770x352.png 770w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-293x134.png 293w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-1400x641.png 1400w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42-1320x604.png 1320w, https:\/\/enexia.be\/wp-content\/uploads\/2026\/05\/Screenshot-2026-05-18-at-15.15.42.png 1416w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Et si \u00e7a ne suffit pas ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Si malgr\u00e9 ces ajustements votre sommeil reste tr\u00e8s perturb\u00e9 plusieurs semaines d&#8217;affil\u00e9e, il peut s&#8217;agir d&#8217;autre chose qu&#8217;un simple inconfort thermique. L&#8217;anxi\u00e9t\u00e9, un rythme circadien chroniquement d\u00e9cal\u00e9 ou d&#8217;autres facteurs peuvent \u00eatre en jeu. N&#8217;h\u00e9sitez pas \u00e0 en parler \u00e0 votre m\u00e9decin ou \u00e0 consulter un sp\u00e9cialiste du sommeil.  Et pour aller plus loin, retrouvez sur enexia.be nos articles sur mieux comprendre le sommeil et le rituel bien-\u00eatre matin et soir \u2014 deux lectures compl\u00e9mentaires pour construire une hygi\u00e8ne du sommeil solide, toute l&#8217;ann\u00e9e.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vous vous retournez dans votre lit depuis une heure. Il fait 27\u00b0C dans votre chambre, le soleil ne s&#8217;est couch\u00e9 qu&#8217;\u00e0 22h, et votre r\u00e9veil sonne dans six heures. Cette sc\u00e8ne, beaucoup d&#8217;entre nous la connaissent d\u00e8s le mois de juin. Et pourtant, peu de gens savent pourquoi la chaleur d\u00e9traque \u00e0 ce point notre sommeil \u2014 et surtout, comment y rem\u00e9dier efficacement. Quand les nuits chaudes perturbent votre repos, comprendre ce qui se passe dans votre corps est le [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1112,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[6],"tags":[],"class_list":["post-1100","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rituel-bien-etre"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>L&#039;impact de la chaleur estivale sur le sommeil : que faire concr\u00e8tement ? - enexia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/enexia.be\/index.php\/2026\/07\/15\/limpact-de-la-chaleur-estivale-sur-le-sommeil-que-faire-concretement\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L&#039;impact de la chaleur estivale sur le sommeil : que faire concr\u00e8tement ? - enexia\" \/>\n<meta property=\"og:description\" content=\"Vous vous retournez dans votre lit depuis une heure. Il fait 27\u00b0C dans votre chambre, le soleil ne s&#8217;est couch\u00e9 qu&#8217;\u00e0 22h, et votre r\u00e9veil sonne dans six heures. Cette sc\u00e8ne, beaucoup d&#8217;entre nous la connaissent d\u00e8s le mois de juin. Et pourtant, peu de gens savent pourquoi la chaleur d\u00e9traque \u00e0 ce point notre sommeil \u2014 et surtout, comment y rem\u00e9dier efficacement. 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