If an athlete's daily intake includes 450g of carbohydrates, how many total kilocalories does that provide, considering carbohydrates supply 4 kcal/g?

To find the total kilocalories provided by carbohydrates, you multiply the grams of carbohydrates consumed by the kilocalories provided per gram. In this case, the athlete consumes 450 grams of carbohydrates, and since carbohydrates supply 4 kilocalories per gram, the calculation is as follows:

450 grams of carbohydrates × 4 kilocalories/gram = 1800 kilocalories.

Therefore, the correct amount of energy provided by the carbohydrate intake is 1800 kilocalories. This showcases how to convert macronutrient intake into energy values, an important aspect for athletes aiming to understand their dietary contributions to performance and recovery.