Circulatory Responses
What happens to your heart rate when you start exercising?
It goes up.
What is tidal volume?
The amount of air you breathe in and out in one breath.
What does cardiorespiratory endurance help you do?
Keep exercising for a long time without getting tired quickly.
What is agility?
Changing direction quickly while staying balanced.
What does steady state mean during exercise?
Your body is getting enough oxygen to match what it needs.
What does stroke volume measure?
How much blood the heart pumps out with each beat.
What happens to your breathing rate during exercise?
It increases.
What is muscular strength?
How much force your muscles can produce in one effort.
What is balance?
Staying steady when still or moving.
Why do we use anaerobic energy at the start of exercise?
Because the body hasn’t supplied enough oxygen yet.
What two things make up cardiac output?
Heart rate × stroke volume.
What is the formula for ventilation?
Tidal volume × breathing rate.
What is muscular endurance?
How long your muscles can keep working without getting tired.
What is coordination?
Using body parts together smoothly.
What happens to blood vessels going to working muscles during exercise?
They widen (vasodilate).
Which part of blood pressure rises the most during exercise?
Systolic blood pressure.
What is vital capacity?
The biggest breath you can possibly breathe out.
What does flexibility measure?
How far a joint can move.
What is reaction time?
How fast you respond to something you see or hear.
Who usually has a higher resting cardiac output: fit males or fit females?
Fit males.
What does VO₂ max tell us about a person?
How much oxygen their body can use during hard exercise.
Why does gas exchange speed up during exercise?
Because your muscles need more oxygen and produce more carbon dioxide.
What does body composition tell us?
How much of the body is fat and how much is muscle, bone, and other tissues.
What is power in sport?
Strength + speed.
Why does stroke volume stop increasing at high intensities?
The heart doesn’t have enough time to fill fully between beats.