18. 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 50 and 80 minutes.
c. between 30 and 60 minutes.
d. less than 20 minutes.

Respuesta :

The aerobic activities is that more the 90 minutes so the answer is A.

hope this help you out 

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