Coach Gary Hall Sr. directs Marc in this session, and by using a Tempo Trainer, takes his freestyle stroke rate from what is appropriate for 100 yards or meters, up to the highest stroke rate Marc is able to achieve- more directed for the 50 sprint. What Marc learns, however, is that going with a faster stroke rate does not always lead to a faster swim. In this session, by going too fast with his arms, or spinning, Marc loses valuable coupling energy and distance per stroke. That leads to a slower test swim than when he slows his stroke rate down slightly, yet uses much better technique.