During a triathlon, an athlete needs to maintain energy levels throughout a prolonged period of over 2.5 hours. What is the best carbohydrate intake strategy during the event?

Question

BlackTom AI · Accepted Answer

In endurance events lasting several hours, carbohydrate fueling strategy is crucial for maintaining power and delaying fatigue.
Option 1: 'Consume 60-70g of carbohydrate per hour, increasing to 90g if tolerated.' This aligns with established guidelines for prolonged aerobic activity, providing a steady supply of glucose to muscles and the liver and allowing for gradual adjustment to higher intakes if the athlete tolerates it well.
Option 2: 'Consume a large carbohydrate meal every hour to maintain energy.' During a race, a large meal per hour is impractical and can cause GI distress, fullness, and slower gastric emptying, making it an ineffective strategy for continuous fueling.
Option 3: 'Restrict carbohydrate intake to 30g per hour to prevent spikes in blood sugar.' Fifty to sixty grams per hour is often recommended, and 30g per hour is generally considered insufficient for sustained energy demands in a 2.5+ hour event, potentially hastening fatigue.
Option 4: 'Focus solely on hydration and consume minimal carbohydrates.' While hydration is essential, neglecting carbohydrate intake deprives muscles of needed glucose, which can impair performance and increase fatigue during extended exercise.
Overall, the per-hour fueling range in Option 1 reflects a balanced, practical approach that athletes often use, with the caveat that individual tolerance and gut health may lead some athletes to adjust upward to 90 g/hour as needs and tolerance allow.

During a triathlon, an athlete needs to maintain energy levels throughout a prolonged period of over 2.5 hours. What is the best carbohydrate intake strategy during the event?单项选择题

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