Using carbo-loading to increase the store of glycogen seems to benefit only those athletes who engage in aerobic activities that are


A. more than 90 minutes.
B. between 30 and 60 minutes.
C. less than 20 minutes.
D. between 50 and 80 minutes.

A?
I'm double checking my answers before submitting!

10. When calculating the daily protein needs for marathon runners or competitive weightlifters, you should allow for approximately______ grams of protein per kilogram of body weight.


A. 0.8 to 1.0
B. 1.0 to 1.2
C. 1.4 to 1.7
D. 1.2 to 1.4

I chose C

These are so specific, they must be included in your text. I could guess, but guessing doesn't help.

To determine the correct answer to this question, you need to understand the concept of carbo-loading and how it relates to glycogen stores and aerobic activities.

Carbo-loading refers to a strategy employed by athletes to maximize their glycogen stores before endurance events or activities. Glycogen is a form of carbohydrate stored in the muscles and liver, which serves as a readily available energy source during exercise.

During aerobic activities, such as running or cycling, the body primarily relies on carbohydrates as a fuel source. When glycogen stores are depleted, the athlete may experience fatigue and a decline in performance.

Based on this information, the correct answer is option A. Carbo-loading is beneficial for athletes engaging in aerobic activities that last more than 90 minutes. This is because the prolonged duration of exercise increases the utilization of glycogen stores, and having higher glycogen reserves can help delay fatigue and improve performance during extended periods of activity.

If the duration of aerobic activity is within a shorter range, such as between 30 and 60 minutes (option B), less emphasis is placed on the need for carbo-loading. Glycogen stores are typically sufficient to sustain the activity for this duration without requiring additional carbohydrate loading.

Likewise, for activities lasting less than 20 minutes (option C), carbo-loading is not necessary as the exercise duration is too short to significantly deplete glycogen stores.

Option D (between 50 and 80 minutes) is also incorrect as it falls within the range where carbo-loading is not typically required.

In conclusion, the correct answer is A, as carbo-loading is most beneficial for athletes engaged in aerobic activities lasting more than 90 minutes.