Identify three sources of stored energy utilized by muscle fibers.

Name: Identify three sources of stored energy utilized by muscle fibers.
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ATP, creatine phosphate, and glycogen are the three sources of stored energy utilized by muscle fibers. ATP is the immediate source of energy for muscle contractions, creatine phosphate is quickly converted to ATP during high-intensity exercise, and glycogen is broken down into glucose to fuel muscle contractions during prolonged exercise.

Identify Three Sources of Stored Energy Utilized by Muscle Fibers