Do You Have a Maximum Heart Rate?

The video explains how heart rate increases during exercise to meet muscle oxygen demands. It discusses the concept of maximum heart rate, which is influenced by age and the nervous system. The heart's contraction speed is limited by the time needed to reset after each signal, preventing it from reaching its theoretical maximum rate. Exercising within a target heart rate zone, typically 50% to 85% of the maximum, is recommended for health benefits without overexertion.

What happens to your heart rate when you exercise and why?

• It decreases because muscles need less oxygen.

• It remains the same because the body is at rest.

• It stops because the body is overexerted.

• It increases because muscles need more oxygen.

How does age affect your maximum heart rate?

• It doubles every decade.

• It remains constant regardless of age.

• It decreases by a beat per minute each year.

• It increases by a beat per minute each year.

What limits the contraction speed of the heart muscle?

• The number of calories consumed.

• The size of the heart muscle.

• The amount of blood in the body.

• The time it takes for ions to reset after a contraction.

Why doesn't the heart reach its theoretical maximum speed?

• Because it would stop completely.

• Because it would cause the body to overheat.

• Because it would pump too much blood.

• Because it would not pump enough blood.

What is the recommended target heart rate zone for exercise?

• 100% to 120% of your max heart rate.

• 10% to 30% of your max heart rate.

• 50% to 85% of your max heart rate.

• 90% to 100% of your max heart rate.