why does an athlete or person in good physical condition has a lower resting heart rate than a person who is relatively unfit.
I ran a Google search using these terms:
athlete resting heart rate
(notice the correct spelling of athlete, or I wouldn't have gotten decent results)
Here are two of the websites at the top of the results list:
Athlete's Heart - Just like other muscles, the heart responds to ...
The most important muscle an athlete develops is her heart. Generally as she becomes more fit, her resting heart rate slows - a sign that her heart is ...
http://www.sportsdoctor.com/articles/heart.html
Heart rate - Wikipedia, the free encyclopedia
Resting heart rates can be significantly lower in athletes, and significantly higher in the obese. The body can increase the heart rate in response to a ...
http://en.wikipedia.org/wiki/Heart_rate
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=)
An athlete or a person in good physical condition has a lower resting heart rate than a person who is relatively unfit because their hearts are more efficient.
During physical exercise, the heart needs to pump more oxygenated blood to the muscles. To meet this demand, the heart undergoes adaptations and becomes stronger. The heart muscles become more efficient at delivering oxygenated blood to the body, reducing the need for the heart to beat as frequently at rest.
Regular exercise also increases the size and strength of the heart, enabling it to pump larger volumes of blood with each beat. This means that with each beat, the heart can deliver more oxygenated blood to the body, reducing the need for the heart to beat as frequently.
Additionally, regular exercise can improve the body's overall cardiovascular health. It can lower blood pressure, improve blood vessel function, and increase the elasticity of blood vessels. This allows the heart to work more efficiently, reducing the resting heart rate.
In summary, an athlete or person in good physical condition has a lower resting heart rate because their heart is stronger, more efficient, and able to deliver more oxygenated blood to the body with each beat.