Question

One hour of bicycle racing can require 500-900 kcal of energy, depending on the speed of the race, the terrain, and the weight of the racer. Tour de France riders must consume abnormal amounts of food to supply this energy. Food in the form of protein or carbohydrates produces 17 kJ of energy per gram consumed. How many kilograms of protein or carbohydrate must be consumed to provide the energy for 170 minutes of racing that requires 650 kcal/hr.1 kcal = 4.184 kJ

Answer 1

Answer:

0.45 kg of protein of carbohydrates are required.

Explanation:

How many kilograms of protein or carbohydrate must be consumed to provide the energy for 170 minutes of racing that requires 650 kcal/hr?

Let's consider the following relations:

• 17 kJ of energy are provided per gram of protein or carbohydrate (nutrient)
• The required supply is 650 kcal per hour of ride.
• 1 kcal is equal to 4.184 kJ
• 1 hour is equal to 60 minutes.
• 1 kg is equal to 10³ g

Then, for 170 minutes:

$170min.\frac{1h}{60min} .\frac{650kcal}{1h} .\frac{4.184kJ}{1kcal} .\frac{1g(nutrient)}{17kJ} .\frac{1kg(nutrient)}{10^{3}g(nutrient) } =0.45kg(nutrient)$

0.45 kg of protein of carbohydrates are required.