Your resting heart rate is an indicator of your fitness level because it directly determines how hard your heart is working at rest and during certain aerobic exercises. The human body's heart can only beat at a maximum of 220 beats per minute but this varies through age. Knowing one's maximum and resting heart could help you in determining the appropriate aerobic exercises that you can engage in.
The best time to measure resting heart rate is when you first wake up in the morning when you are very still in bed because any sudden movements (e.g. light walk) would cause the heart to beat fast.
Answer:
tar,nicotine
Explanation:
The main carcinogenic components of tabacco are nicotine and tar.
I don’t know if i’m 100% correct but I think the answer would be B , ( sorry if I’m wrong! <3 )
The answer is C. 19 to 26 the actual age people reach their physical peak is 26 which therefore is C as your answer.
Only for a few minutes until they can get oxygen on them
