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  • Radha was running on a treadmill at a great speed for 15 minutes continuously. She stopped the treadmill and abruptly came out. For the next few minutes, she was breathing heavily/fast. Answer the following questions.

Radha was running on a treadmill at a great speed for 15 minutes. She stopped the treadmill and abruptly came out. For the next few minutes, she was breathing heavily.

Answer the following questions.

(a) What happened to her muscles when she did strenuous exercise?
(b) How did her breathing rate change?

Answers (1)

(a) Strenuous exercise increases the strain on the muscles.
(b) Breathing changes from normal to high while running on a treadmill. Due to an increase in the workload on the muscles, the energy consumption of muscles also increased.

As a result, a higher demand for carbohydrates is required. Also, the oxygen demand by the muscles increases. This is fulfilled by the increased blood supply to the muscles. The heart and lungs work at a faster pace to fulfil the increased demand.

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