Multiple choice general knowledge

When you run only --% of the chemical energy in your muscles is converted into kinetic energy, the rest changes into heat energy.

  1. 10

  2. 15

  3. 20

  4. 25
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Only about 25% of the chemical energy from muscle metabolism is converted into useful kinetic energy for movement. The remaining 75% is released as heat, which is why exercise increases body temperature. This relatively low efficiency is similar to that of internal combustion engines and is a fundamental aspect of biological energy conversion.

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