Carbohydrate loading is one of the most talked about yet misunderstood topics in sports nutrition. For a start, all athletes, from darts players to ultramarathon runners, think they need to do it. Second, many athletes use carbo-loading as a euphemism for gluttony—never mind the quality of the food, it’s quantity that counts. And finally, the technique has been refined since its introduction in the 1960s, but many athletes have yet to catch up with the news.
To remove the mysticism from what is a potentially valuable practice, you should first decide whether your sport requires you to have super-loaded muscle glycogen stores. If you are going to drive around the block, you don’t need an extra petrol tank in your car—it would just mean extra weight to carry. If you are driving in an endurance rally, on the other hand, you’ll have an opportunity to use the additional fuel. Typically, endurance sports that involve over 90 minutes of continuous high-intensity exercise, using the same muscle groups, will challenge the capacity of the athlete’s normal fuel stores.
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Think about this definition carefully. Although your triathlon may take over two hours, it involves three separate sports and therefore different muscle groups. And while a game of basketball may also take 90 minutes to complete, the duration of any one player’s activity may be considerably shorter. You may need to think back to past events—did your pace or performance drop off late in the competition, accompanied by symptoms of muscle-glycogen fatigue? If so, it may be helpful to face the starting gun with super-loaded glycogen stores. You won’t run faster or work harder in the beginning, but you will be able to exercise at your optimum pace for longer