Why does an increased heart rate during exercise help muscles contract?

An increased heart rate will cause an increase in blood flow around the body (increased cardiac output). This means that there will be more oxygen and more glucose being supplied to the muscles. Since oxygen and glucose are required for aerobic respiration, by increasing the blood flow to the muscles, more aerobic respiration can occur. This produces ATP, which releases the energy needed for our muscles to contract.

AD
Answered by Adam D. Biology tutor

8471 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

How do bacteria develop resistance to antibiotics?


Function of the heart.


Describe what happens in each stage in the cell cycle.


How is a sperm cell adapted to its role?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning