If you haven't already seen this video it really is worth seven and a half minutes of your time:
But...his "heart-rate sits at 185 beats per minute for the duration of the downwind legs"! That sounds more like a 10-minute heart attack than physical exercise.
And the bits in the gym - all I can say is I won't be doing pull ups with weights chained between my legs any time soon.
Fortunately, for those of us that are mere mortals we don't have to be that fit to go racing.
But he does make Finn sailing look absolutely amazing.