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Naddika [18.5K]
3 years ago
9

The increase in heart rate at the very beginning of exercise is due to

Biology
2 answers:
Sergio [31]3 years ago
6 0

Answer:

a greater volume of blood returning to the heart

Explanation:

Your heart rate goes up when your heart starts pumping faster.

Lina20 [59]3 years ago
4 0

Answer:

A greater volume of blood returning to the heart.

Explanation:

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