Question

What is the substance that causes fatigue in our legs when we exercise too much?
a. carbon dioxide
b. lactic acid
c. alcohol
d. water​

Answer 1

Answer:

lactic acid

Explanation:

when we exercise too much lactic acid accumulates in our muscles that cause crumps, fatigue, etc.

Hope this will help u

Answer 2

Explanation:

Lactic acid is right answer

As we run or walk it causes cramp