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At the start of a 100-yard dash (race), your body relies on which reserve as its energy source?
a. atp-cp
b. lactic acid
c. creatine phosphate
d. aerobic oxygen

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"Creatine phosphate" is the one among the following choices given in the question on which your body relies on at the start of a 100-yard dash. The correct option among all the options that are given in the question is the third option or option "c". I hope that this is the answer that has come to your desired help.

Answer:

The correct answer would be a. ATP-CP.

ATP-PC (adenosine triphosphate and phosphocreatine) system is the energy system which provides energy for short duration exercises which are completed in 10-15 seconds.

If the activity continues beyond 15 seconds the body switches to other energy systems such as the lactic acid system and aerobic system.

It takes almost 2-3 minutes to replenish the lost ATP and PC.

Few exercises which may rely on ATP-PC system are performing one rep max, sprinting for 50-100 meters, et cetera.

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