The Ironman 70.3 in New Orleans was Chris McCormack's 3rd race this year. Especially when you are traveling a lot, and you arrive very close to race day there is not much time for the body to adjust, no time for long training sessions. So better to get some rest instead of overdoing it with strenuous exercise.
In this clip Chris kills some time with stretching in his hotel room on the day before the race. He seems not too enthusiastic about the necessary.