{"id":132,"date":"2026-07-07T08:58:52","date_gmt":"2026-07-07T12:58:52","guid":{"rendered":"https:\/\/theironnutrition.com\/?p=132"},"modified":"2026-07-20T17:00:51","modified_gmt":"2026-07-20T21:00:51","slug":"carbohydrate-loading-for-endurance-athletes","status":"publish","type":"post","link":"https:\/\/theironnutrition.com\/br\/carbohydrate-loading-for-endurance-athletes\/","title":{"rendered":"Carregamento de carboidratos para atletas de resist\u00eancia: as 7 melhores estrat\u00e9gias para o protocolo definitivo no dia da prova"},"content":{"rendered":"\n
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Note: This article contains affiliate links. If you make a purchase through them, The Iron Nutrition may receive a small commission at no additional cost to you. We only recommend products that we have tested and trust to help improve our performance.<\/p>\n\n\n\n

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Table of Contents<\/h2>\n\n\n\n\n\n
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Introduction<\/h2>\n\n\n\n

Why Carbohydrate Loading Is a Game-Changer<\/h4>\n\n\n\n

Carbohydrate loading for endurance athletes<\/strong> is one of the most rigorously researched and powerfully effective nutrition strategies in all of sports science. Done correctly, it can be the difference between hitting the wall at kilometre 30 and crossing the finish line with power still in reserve.<\/p>\n\n\n\n

The fundamental principle is deceptively simple: in the days before a major endurance event, you systematically flood your muscles with glycogen \u2014 the body’s stored form of glucose \u2014 beyond their normal resting capacity. The result is a supersaturated fuel reserve that delays fatigue, preserves pace, and supports sustained high-intensity output long after an unloaded competitor would be forced to slow.<\/p>\n\n\n\n

For marathoners, triathletes, road cyclists, and open-water swimmers targeting events lasting 90 minutes or more, mastering this protocol is not optional. It is an essential, evidence-backed competitive tool.<\/p>\n\n\n\n

This guide from The Iron Nutrition<\/strong> gives you the complete, science-grounded playbook \u2014 seven elite-level strategies, the most common mistakes to avoid, and the exact foods to use. Let’s build your race-week fuel plan.<\/p>\n\n\n

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\"Carbohydrate<\/figure>\n<\/div>\n\n\n
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The Science of Glycogen: How Carbohydrate Loading Works<\/h2>\n\n\n\n

To use this protocol intelligently, you need to understand what’s happening at the muscle level.<\/p>\n\n\n\n

Your skeletal muscles and liver store carbohydrates as glycogen<\/strong> \u2014 chains of glucose molecules held ready for rapid mobilisation. The average untrained adult holds roughly 400\u2013500 g of glycogen across these stores. Well-conditioned endurance athletes, through years of high-carbohydrate training, can maintain baseline stores of 500\u2013700 g.<\/p>\n\n\n\n

The problem: sustained endurance exercise at moderate-to-high intensity depletes even elite glycogen reserves within 90\u2013120 minutes<\/strong>. When stores drop critically low, the body cannot sustain pace, cognitive function deteriorates, and the cascade of symptoms known as “bonking” or “hitting the wall” begins.<\/p>\n\n\n\n

This is precisely where carbohydrate loading for endurance athletes delivers its competitive edge. A peer-reviewed study published in the International Journal of Sport Nutrition and Exercise Metabolism<\/a><\/strong> confirmed that a structured carbohydrate loading protocol can elevate muscle glycogen concentrations by 50\u2013100% above baseline, directly extending time to exhaustion and improving performance in events exceeding 90 minutes.<\/p>\n\n\n\n

The mechanism is well established. When dietary carbohydrate intake is substantially elevated in the context of reduced training volume, insulin-driven glucose uptake is maximised, and the enzyme glycogen synthase \u2014 responsible for building glycogen chains \u2014 is upregulated. The result is a muscle cell packed with supraphysiological fuel reserves.<\/p>\n\n\n\n

One important physical side-note: every gram of glycogen stored draws approximately 3 g of water<\/strong> into the muscle alongside it. An athlete who successfully loads will often gain 1\u20132 kg in the days before a race. This is not fat, and it is not cause for alarm. That water is tightly bound to glycogen and represents an additional reservoir of hydration that is released during exercise \u2014 a secondary benefit of the protocol.<\/p>\n\n\n\n

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\"Diagram<\/figure>\n<\/div><\/blockquote>\n\n\n\n
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The 7 Best Strategies for Carbohydrate Loading<\/h2>\n\n\n\n

Strategy 1: Master the 72-Hour Taper Window<\/h3>\n\n\n\n

Timing is everything. The modern carbohydrate loading for endurance athletes<\/strong> protocol is initiated three days (72 hours) before race start<\/strong> \u2014 not a week out, and not the night before.<\/p>\n\n\n\n

During this 72-hour window, you simultaneously reduce training volume by 40\u201350% (your taper is already happening) and sharply increase carbohydrate intake. This dual shift \u2014 less energy expenditure, more carbohydrate substrate \u2014 creates the conditions for maximum glycogen supercompensation.<\/p>\n\n\n\n

The old-school “depletion-then-load” method, which involved exhaustive exercise in the week before competition to first drain glycogen stores, has been largely retired by modern sports science. Current evidence strongly supports the simplified 3-day high-carbohydrate approach as equally effective and far less physically and psychologically taxing on the athlete.<\/p>\n\n\n\n

Strategy 2: Calculate Your Carbohydrate Targets Precisely<\/h3>\n\n\n\n

Vague guidance like “eat more carbs” will not supercompensate your glycogen stores. Precision is the protocol.<\/strong><\/p>\n\n\n\n

Research-backed daily carbohydrate targets during the loading phase:<\/p>\n\n\n\n

Athlete Profile<\/td>Carbohydrate Target<\/td><\/tr>
Recreational endurance athlete<\/td>8\u201310 g per kg of bodyweight<\/td><\/tr>
Competitive \/ trained athlete<\/td>10\u201312 g per kg of bodyweight<\/td><\/tr>
Elite or ultra-endurance athlete<\/td>12\u201313 g per kg of bodyweight<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

For a 70 kg competitive marathon runner, this translates to 700\u2013840 g of carbohydrate per day<\/strong> \u2014 a dramatic increase from a typical training-day intake of 350\u2013450 g. Spread this across five to six meals and structured snacks, never attempting to consume it in one or two sittings.<\/p>\n\n\n\n

Strategy 3: Choose the Right Carbohydrate Sources<\/h3>\n\n\n\n

Not all carbohydrates perform equally during a loading phase. The priority is high digestibility, low gastrointestinal burden, and high glycaemic efficiency<\/strong>.<\/p>\n\n\n\n

Prioritise these sources:<\/strong><\/p>\n\n\n\n