Cardiovascular drift

Question 1

What happens when a performer starts working aerobically?

Answer 1

• When a performer is working aerobically their HR will reach a certain point where O2 supply meets O2 demand.
• This is known as a steady state.

Question 2

What has new research shown?

Answer 2

• New research has shown that HR does not always stay the same, but actually continues to rise slowly in warm conditions.
• This is because the performer begins to sweat + blood volume decreases as a result.

Question 3

Cardiovascular drift (the process pt.1)

Answer 3

1) Happens in a warm environment, when periods of exercise last longer than 10 minutes.
2) Performer begins to sweat.
3) Fluid loss leads to an increase in blood viscosity due to a reduced plasma volume.

Question 4

Cardiovascular drift (the process pt.2)

Answer 4

4) Arterial blood pressure decreases.
5) Venous return decreases.
6) Stroke volume decreases.
7) HR increases in order to maintain cardiac output.
- Basically it needs to beat more in order to deliver the same amount of O2 to the working muscles.

Question 5

How can an individual prevent cardiovascular drift?

Answer 5

• Staying hydrated.
• Controlling core body temp.
• Training correctly.
• Monitoring effort.