what is aerobic fitness ADVERTISEMENT 655 viewsMay 26, 2014 0 KT May 26, 2014 0 Comments if u had to define aerobic fitness? 6 Answers ActiveVotedNewestOldest 0 Scott10 Posted 0 Comments When explaining it to clients I simply say that cardiorespiratory fitness is the ability of the heart and lungs to efficiently supply oxygen rich blood to the skeletal muscles for sustained physical activity. You are viewing 1 out of 6 answers, click here to view all answers. Register or Login