Question

On average, an adult human being at rest breathes 15–18 times per minute. The breathing rate, however, may differ under different conditions. Arrange the following activities given in the box in order of increasing breathing rates and give a reason for your answer.

sleeping, cycling, brisk walking, watching TV

Answer 1

Respiratory rate:

1. The respiratory rate of a person in a resting posture is the same as their resting respiratory rate, which is 15–18 breaths per minute.
2. Here, sleeping in the position that leaves you feeling the most rested, whereas watching TV only necessitates a few more breaths.
3. While engaging in vigorous physical activity, the respiratory rate rises.
4. A brisk walk necessitates moving quickly, which results in a strenuous physical workout and increased respiratory rate.
5. Cycling, on the other hand, calls for the use of more muscles than brisk walking does, which raises the respiratory rate needed to give the extra oxygen needed while cycling.

Final answer: Ascending order will be: sleeping> watching T.V. > Brisk walk> Cycling.