 Runners will be equipped with several reflective markers, which will be placed on your lower body. Runners will then complete several passes across a runway while we record your running with a motion analysis system. Runners will be equipped with a mouthpiece and nose clip. You will run for 10 minutes while we collect the gases you breathe.Twenty-four hours after you complete this running trial, you will come to our Exercise Physiology lab in Johnson Center, B143 to perform the training sessions. During this time you will run for about 10-30 minutes in front of a mirror and receive feedback from the research team. You will perform these training sessions eight times over two weeks. Twenty-four hours after your last training session, you will perform another follow-up running trial, which will be the same as the first trial. After completing the second running trial, you will be allowed to return to your normal running routine for about one month. After one month, you will return to the Gait Analysis lab to perform a final running trial, which will be the same as the first and second running trials. 