Healthy heart A healthy heart has a human that maintains a healthy lifestyle. At rest, it emits 4.5 liters of blood per minute, and during physical e

Healthy, weak, athletic and untrained heart

Healthy heart

A healthy heart has a human that maintains a healthy lifestyle. At rest, it emits 4.5 liters of blood per minute, and during physical exertion — up to 20 liters. Healthy heart always has a reserve (a certain rate) of endurance. A great promoter of a healthy lifestyle, skeletal muscle and heart muscle workouts was Ukrainian surgeon Nikolai Amosov.

Untrained heart

An untrained heart has a human that maintains a sedentary lifestyle. It can provide normal blood emissions only at rest, and with any load is not able to meet the body's needs.

For example, the untrained heart is the same as healthy and capable to throw 4 liters of blood per minute, but on exertion instead of 20 — only 6 liters.

An untrained heart is very dangerous!

Weak heart

Weak heart is a heart that, as a result of various diseases of the valves, heart muscles, coronary arteries, and others, is not able to throw the right amount of blood even at rest (2-3 liters instead of 4-5 liters). Human tissues with weak heart do not get enough oxygen even at rest, and any physical stress can cause death from heart failure.

Athletic heart

When a person is constantly trains his body, his heart can ensure normal blood ejection even under the most severe physical or emotional stress.

Due to exercises the heart muscle increases in volume (work hypertrophy), they have a lot of substances accumulated (contractile proteins, ATP), which enhance its contraction. With intensive physical exertion athletic heart increases heart rate and pumps a sufficient amount of blood to the body not due to an increase in heart rate, but only by increasing its rate strength (i.e. increase the stroke volume).

How to train your heart

Physical training is necessary throughout life, starting with easy exercises, gradually moving to more difficult. Why so? Taken from http://worldofschool.org

Sudden cardiac overload of an untrained heart can lead to severe complications, even to the development of myocardial infarction and heart failure. In 14-16-year-old boys and girls ratio of heart to body weight is less than that in adult, so it cannot withstand heavy exertion if over-trained, even at that age.

During the training you need to monitor your heart rate: it should not exceed 150 beats per minute. If the heart rate is more, the exercise must be cancelled.

All exercises must be performed outdoor or in a well-ventilated area!

Categories:
Questions:
  • What is a healthy, athletic, untrained and weak heart?

  • What heart may be considered untrained and what attributes characterize it?

  • What positive changes can be observed in an athletic heart?

  • Explain the mechanism of improving the work of the athletic heart.

  • Why is dangerous to have an untrained heart?