Not that long time ago, I was talking with an ex formula competition sailor.
The way he explained it, FW can be one of the most exhausting disciplines.
Often they need to carry the wide board + 12m gear (quite heavy) on very wide sandy beaches for a long distance to reach the water. Arriving at the water, already tired, heated up and full of sweat, they often encounter a strong shore break where they have to go through, trying not to drop the 12m sail into the water and manage their way to the more clean & open sea. There somtimes waits a huge swell with lots of chop, very eager to tear down all that nice but rather heavy equipment. Do you get a little bit the picture ...
Don't get me wrong, I like FW. But I've seen a competition going on at the rough baltic sea in Poland and I say "Respect, to all FW competition surfers out there !"
IS87 / IS101 / IS122 / US147