Questions: 2 Andrew has decided to start training for a 10k trail run. Assuming that he runs a 10-minute-per-mile pace on day 1 of training and on race day, which of the following statements is TRUE? Multiple Choice Andrew will expend more calories per mile on day 1 of training. Andrew will utilize more energy from fat on race day. Andrew will have increased stores of glycogen on day 1 of training. Andrew will have increased carbohydrate oxidation on race day.

The answer is the second one: Andrew will utilize more energy from fat on race day.

Explanation for each option:

1. Andrew will expend more calories per mile on day 1 of training.

   • This statement is generally incorrect. The number of calories expended per mile is primarily a function of distance and body weight, not the day of training. While fitness level can affect overall efficiency, the difference in calorie expenditure per mile between day 1 and race day is not significant enough to make this statement true.

2. Andrew will utilize more energy from fat on race day.

   • This statement is true. As Andrew's fitness improves through training, his body becomes more efficient at utilizing fat as a fuel source during prolonged exercise. This is a common adaptation in endurance training, where the body shifts to using a higher percentage of fat for energy, sparing glycogen stores.

3. Andrew will have increased stores of glycogen on day 1 of training.

   • This statement is incorrect. Glycogen stores typically increase with consistent training and proper nutrition. On day 1 of training, Andrew's glycogen stores would likely be lower compared to race day after a period of training and carbohydrate loading.

4. Andrew will have increased carbohydrate oxidation on race day.

   • This statement is incorrect. While carbohydrate oxidation does occur during exercise, the body's adaptation to endurance training usually results in a greater reliance on fat oxidation to preserve glycogen stores. Therefore, carbohydrate oxidation might not necessarily increase on race day compared to day 1 of training.

Summary: Andrew will utilize more energy from fat on race day due to the adaptations his body undergoes through consistent training, which enhances fat metabolism and conserves glycogen stores.