For poorly trained individuals, the resting heart rate is typically:

For poorly trained individuals, the resting heart rate is typically much higher due to several physiological factors. When a person is not regularly engaging in cardiovascular exercise, the heart muscle does not become as efficient at pumping blood. As a result, the heart needs to beat more frequently to maintain adequate blood flow and supply oxygen to the body.

In contrast, individuals who are well-trained have stronger, more efficient hearts. Their hearts can pump a greater volume of blood per beat, leading to a lower resting heart rate. Factors such as overall fitness level, cardiovascular conditioning, and even lifestyle choices contribute to these differences in resting heart rate.

Furthermore, poorly trained individuals may also experience higher levels of stress or reduced overall physical conditioning, both of which can contribute to an elevated resting heart rate. Understanding this concept is important in recognizing how fitness levels affect heart rate and general cardiovascular health.