Verywell Health on MSN1y
What’s a Normal Resting Heart Rate by Age? Charts & Health Tips
Medically reviewed by Christopher Lee, MD The normal resting heart rate varies by age. In adults, any number between 60 and ...
BBC4y
The efficiency of the respiratory system
Breathing rate (or frequency, f) is the number of breaths taken in one minute. The average resting breathing rate is approximately 12-15 breaths in a minute. Tidal volume (TV) is the amount of air ...