Sarah’s breathing changes because when you jog, your muscles need more oxygen to keep going. Your body responds by making you breathe faster and deeper so more oxygen gets into the blood and carbon dioxide is removed. This also makes your heart beat quicker to pump the oxygen-rich blood to the muscles.
When you stop jogging and rest, your muscles need less oxygen, so your breathing slows down and returns to normal. The body automatically adjusts the breathing rate to match the amount of oxygen the muscles require at that moment.
M
Moderator fromJan 22, 2026 10:20 AM
Great contribution,
A
ASIIMWE CHRIS from Kasese Secondary schoolApr 28, 2026 11:00 AM
Faster breathing during jogging: as she exercised her muscles demanded more oxygen and produced more carbon dioxide to meet this demand,her breathing became faster and deeper so she could: take in more oxygen
Remove excess carbon dioxide
Increased heart activity
Her heart beat faster to quickly transport oxygen to the muscles and carry away carbon dioxide
Return to normal when resting
When she stopped jogging, her muscles no longer needed as much energy so,
Oxygen demand decreased
Carbon dioxide production reduced
Her breathing and heart rate gradually returned to normal
When you stop jogging and rest, your muscles need less oxygen, so your breathing slows down and returns to normal. The body automatically adjusts the breathing rate to match the amount of oxygen the muscles require at that moment.
Remove excess carbon dioxide
Increased heart activity
Her heart beat faster to quickly transport oxygen to the muscles and carry away carbon dioxide
Return to normal when resting
When she stopped jogging, her muscles no longer needed as much energy so,
Oxygen demand decreased
Carbon dioxide production reduced
Her breathing and heart rate gradually returned to normal