And I'm glad I did.
It turns out that I'm "just fit enough". Just fit enough for 4 minutes - give or take a few seconds - of gut wrenching, lung bursting, heart galloping exertion. Just fit enough to maintain a decent stroke rate. Just fit enough to even have a kick at the finish. Just fit enough to help both boats to a third place finish.
Then I got home and Adam Kreek, 2008 Canadian Olympic gold medal rower, was on my Facebook feed. Watch and enjoy.
And stay fit enough!