You get tired when you run because our leg muscles don't get enough oxygen anymore.
Answer:
A pedometer, or step-counter, is a device, usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hands or hips.
Explanation:
Are there choices to this question if so what are they
Sometimes people involved in a disagreement must compromise, or A. give up something, to solve the problem.