Question

Hailey did 10 sets of sprints. When she relaxed afterward, her muscles started to feel sore. Which of the following best explains what was built up in her muscles?

Answer 1

The answer is lactic acid was built up in her muscles. BELIEVE ME!!!!

Step-by-step explanation:

How I know this is the right answer is because I took the test and got the answer right on the test. Soooooooo if it is right on the test, it has to be the right answer!!!! :)

Answer 2

It sounds like lactic acid was built up in her muscles.