Practice Quiz

ACSM Personal Trainer

Category - Exercise Programming and Implementation

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Although it makes energy immediately available for use, which energy pathway can only support about 30 seconds of sustained activity of all-out effort?
  1. The nonoxidative system
  2. The oxidative system
  3. The phosphagen system
  4. Kreb’s cycle
Explanation
Answer: C - Although it makes energy immediately available for use, the phosphagen system can only support about 30 seconds of sustained activity of all-out effort. The enzyme creatine kinase breaks down phosphocreatine so that the phosphate group can be added to ADP to create ATP.
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