{"id":35045,"date":"2026-03-03T12:33:21","date_gmt":"2026-03-03T11:33:21","guid":{"rendered":"https:\/\/getindya.com\/?p=35045"},"modified":"2026-11-03T17:09:13","modified_gmt":"2026-11-03T16:09:13","slug":"nutrition-extreme-cold-ultra-distance","status":"publish","type":"post","link":"https:\/\/getindya.com\/en\/nutrition-extreme-cold-ultra-distance\/","title":{"rendered":"Nutrition in Extreme Cold: Energy Requirements and Ultra-Distance Strategies"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Nutrition planning for ultra-distance events in extreme cold requires a different approach from temperate conditions. The body must cover both prolonged exercise costs and the substantial thermogenic energy needed to maintain core temperature.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"999\" height=\"500\" src=\"https:\/\/getindya.com\/wp-content\/uploads\/Nutricion-en-frio-extremo-1.png\" alt=\"Nutrition in extreme cold\" class=\"wp-image-33044\" title=\"\" srcset=\"https:\/\/getindya.com\/wp-content\/uploads\/Nutricion-en-frio-extremo-1.png 999w, https:\/\/getindya.com\/wp-content\/uploads\/Nutricion-en-frio-extremo-1-300x150.png 300w, https:\/\/getindya.com\/wp-content\/uploads\/Nutricion-en-frio-extremo-1-768x384.png 768w\" sizes=\"auto, (max-width: 999px) 100vw, 999px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article examines:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Key physiological changes in extreme cold<\/li>\n\n\n\n<li>Changes in substrate oxidation<\/li>\n\n\n\n<li>Actual competition energy requirements<\/li>\n\n\n\n<li>Nutritional strategies for practice<\/li>\n\n\n\n<li>Common mistakes that compromise performance<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">We explore changes during sport in freezing or high-altitude conditions, propose corresponding nutrition strategies and review common competition mistakes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Physiological processes and homeostatic adaptations in extreme cold<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The main biological priority during cold exposure is maintaining a stable body temperature. When cold exceeds the body&#8217;s heat production, a cascade of neuroendocrine responses activates to prevent hypothermia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Thermogenesis mechanisms and their metabolic impact&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cold-induced thermogenesis has two mechanisms: shivering and non-shivering thermogenesis.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Shivering involves involuntary skeletal muscle contractions with very low metabolic efficiency. Most energy spent contracting these fibres dissipates as heat rather than producing movement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This <a href=\"https:\/\/journals.physiology.org\/doi\/full\/10.1152\/japplphysiol.00210.2024\" target=\"_blank\" rel=\"noopener\">study<\/a> assessed cold&#8217;s impact on substrate oxidation at rest and during activity and on basal metabolic expenditure, finding that the latter can increase fivefold.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Non-shivering thermogenesis occurs at the molecular level in brown adipose tissue (BAT). Noradrenaline release activates BAT, lipolysis and glycolysis, increasing energy availability.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Changes in substrate oxidation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Extreme cold shifts exercise substrate preference towards carbohydrates, particularly non-mitochondrial glycolysis and muscle glycogen use. Shivering, when present, adds further glucose demand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Starting competition with maximised muscle glycogen stores becomes even more important than in normal temperatures.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK232868\/\" target=\"_blank\" rel=\"noopener\">article<\/a> proposes that low glycogen availability accelerates peripheral fatigue and disables shivering, increasing vulnerability to hypothermia.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Haemodynamic and cardiovascular responses&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sympathetically mediated peripheral vasoconstriction is another important response. It reduces blood flow to skin and superficial tissues to preserve supply to vital organs.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This increases peripheral vascular resistance and mean arterial pressure. Redistributing blood towards the core also activates mechanoreceptors, sending a signal interpreted as fluid overload.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This apparent overload triggers diuresis and greater urinary excretion. Cold, dry air also increases respiratory water loss.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Haematological and oxygen transport adaptations<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When competition combines cold and altitude, acclimatisation mechanisms activate to maximise oxygen transport.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Altitude stimulates erythropoietin production to raise haematocrit and oxygen transport. This affects iron requirements, discussed below.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dilutional pseudoanaemia is common: total red blood cell mass increases, but plasma volume rises more, resulting in a lower relative concentration.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Intense exercise raises hepcidin, a peptide hormone that temporarily inhibits intestinal iron absorption for 3\u20136 hours afterwards. This complicates nutritional management of iron stores.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nutritional strategies<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Energy requirements<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Energy requirements increase by varying amounts, but this rise must be anticipated. Military studies report daily expenditure above 4,000 kcal during sub-zero expeditions.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An initial recommendation could be to increase total energy intake by 10\u201315% compared with normal temperatures, then assess progress alongside other factors.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Macronutrient distribution<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Since muscle glycogen is the main fuel, maximising stores before competition is essential. Prioritise carbohydrates over other macronutrients during the preceding 24\u201372 hours.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on event demands, intake during competition may be around 60\u201390 g\/hour. This is highly individual and depends on tolerance and total energy expenditure.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dietary fats are important throughout the day because their energy density helps meet very high requirements. Prioritise polyunsaturated sources such as omega-3 for their anti-inflammatory role.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"999\" height=\"545\" src=\"https:\/\/getindya.com\/wp-content\/uploads\/Nutricion-en-frio-extremo-suplementacion.png\" alt=\"Nutrition in extreme cold: supplementation\" class=\"wp-image-33047\" title=\"\" srcset=\"https:\/\/getindya.com\/wp-content\/uploads\/Nutricion-en-frio-extremo-suplementacion.png 999w, https:\/\/getindya.com\/wp-content\/uploads\/Nutricion-en-frio-extremo-suplementacion-300x164.png 300w, https:\/\/getindya.com\/wp-content\/uploads\/Nutricion-en-frio-extremo-suplementacion-768x419.png 768w\" sizes=\"auto, (max-width: 999px) 100vw, 999px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key micronutrients<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Iron and vitamin C: adequate pre-competition iron stores are essential for the reasons discussed. Pair dietary iron with vitamin C to maximise absorption.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vitamin B12 and folate: crucial for red blood cell formation. Low levels are associated with reduced haemoglobin synthesis.&nbsp;&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hydration: water, carbohydrates and electrolytes<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Despite apparently lower sweat rates, cold-induced diuresis and respiratory losses make dehydration a serious risk.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Calculate sweat rate using pre- and post-exercise body weight, the weight of all fluids consumed and, if applicable, urine output.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A general sodium recommendation may be 600\u20131,000 mg\/hour, potentially higher. Beyond replacing sweat losses, higher sodium concentrations in sports drinks improve fluid retention and counter cold-induced diuresis. They may also slightly increase thirst, encouraging drinking.&nbsp;<\/p>\n\n\n\n<div style=\"max-width: 900px;margin: 3rem auto;padding: 2.8rem 2.2rem;background: #11151C;border-radius: 14px;text-align: center\">\n\n  <h4 style=\"margin: 0 0 1.2rem 0;color: #FFFFFF;font-weight: 700\">INDYA \u00b7 Professional nutrition software<\/h4>\n\n  <p style=\"margin: 0 auto 2.2rem auto;max-width: 720px;font-size: 1.05rem;line-height: 1.65;color: #FFFFFF;opacity: 0.9\">Personalised nutrition planning, continuous client follow-up and comprehensive practice management in one platform designed for nutritionists and nutrition teams.<\/p>\n\n  <a href=\"https:\/\/getindya.com\/en\/nutrition-software\/\" style=\"display: inline-block;padding: 1rem 2.4rem;background: #5958FF;color: #FFFFFF;font-size: 1rem;font-weight: 600;text-decoration: none;border-radius: 10px\">\n    TRY INDYA FREE\n  <\/a>\n\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Common mistakes when managing cold during competition<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Cold-induced appetite suppression<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cold exposure may reduce appetite through increased leptin, making energy requirements even harder to meet.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Careful pre-event and in-race nutrition planning is therefore particularly important.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dehydration and thirst perception<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"999\" height=\"545\" src=\"https:\/\/getindya.com\/wp-content\/uploads\/nutricion-en-frio-extremo-Deshidratacion.png\" alt=\"Nutrition in extreme cold: dehydration\" class=\"wp-image-33051\" title=\"\" srcset=\"https:\/\/getindya.com\/wp-content\/uploads\/nutricion-en-frio-extremo-Deshidratacion.png 999w, https:\/\/getindya.com\/wp-content\/uploads\/nutricion-en-frio-extremo-Deshidratacion-300x164.png 300w, https:\/\/getindya.com\/wp-content\/uploads\/nutricion-en-frio-extremo-Deshidratacion-768x419.png 768w\" sizes=\"auto, (max-width: 999px) 100vw, 999px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As discussed, cold may reduce thirst and encourage dehydration.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tips to encourage fluid intake include:&nbsp;<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Warm drinks such as tea or herbal infusions accompanied by <a href=\"https:\/\/getindya.com\/en\/carbohydrates-complete-guide\/\">carbohydrates<\/a><\/li>\n\n\n\n<li>Increasing sports drink sodium concentration<\/li>\n\n\n\n<li>Keeping bottles close to the body during exercise to prevent cooling or freezing.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Frozen food and drinks<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Body heat helps prevent competition supplies from freezing. Starting with a warm drink also helps maintain body temperature.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Higher drink osmotic concentration delays freezing: use bottles containing higher carbohydrate and sodium concentrations.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Energy gels containing thickeners such as pectin may also freeze more slowly for the same reason.&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nutrition planning for ultra-distance events in extreme cold requires a different approach from temperate conditions.<\/p>\n","protected":false},"author":18,"featured_media":33043,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","footnotes":""},"categories":[213,215,1],"tags":[],"class_list":["post-35045","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition","category-nutrition-software-indya","category-sin-categoria"],"acf":[],"_links":{"self":[{"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/posts\/35045","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/comments?post=35045"}],"version-history":[{"count":2,"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/posts\/35045\/revisions"}],"predecessor-version":[{"id":35532,"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/posts\/35045\/revisions\/35532"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/media\/33043"}],"wp:attachment":[{"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/media?parent=35045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/categories?post=35045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/getindya.com\/en\/wp-json\/wp\/v2\/tags?post=35045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}