During exercise, multiple acute responses occur in the body to deliver more oxygen to the muscles. With the assistance of her Cross Fit coach, a trained athlete, and a sports scientist, our presenter takes us through some of these responses, including recruitment of slow and fast-twitch muscle fibers, arteriovenous oxygen difference, enzyme concentration and lactic acid build-up.

Originally released by Video Education Australasia, 2016. Streaming video file encoded with permission for digital streaming by Infobase on January 19, 2017.