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 17.0 kJ of energy per gram consumed. How many kilograms of protein or carbohydrate must be consumed to provide the energy for 195 minutes of racing that requires 650.0 kcal/hr. (Recall 1 kcal = 4.184 kJ)
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 17.0 kJ of energy per gram consumed. How many kilograms of protein or carbohydrate must be consumed to provide the energy for 195 minutes of racing that requires 650.0 kcal/hr. (Recall 1 kcal = 4.184 kJ)
Given that -
One gram of protein or carbohydrate produces = 17.0 kJ
Time = 195 minutes = 195/60 = 3.25 hr
Required energy = 650.0 kcal/hr
Also given that - 1 kcal = 4.184 kJ
Thus, one gram protein or carbohydrate gives = 17.0 kJ = 4.063 kcal
And, we want to calculate the amount of protein or carbohydrate in kilogram.
As 650.0 kcal energy required = 1 hour
Then, 3.25 hour will require -
=> 3.25 hour × (650.0 kcal/1 hour)
=> 2112.5 kcal
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