Started the day off tired but went to swim anyway because it was Flip Turn Day! Turned out to be a total disaster. I didn't count on how much effort it would take to flip my much heavier legs over. Then I actually got dizzy (!) doing them, and dizzy, for me, is bad news. After 100 yards of warmup I did half a dozen flip turns (which, despite being a bit disoriented, I actually pulled off correctly) when I threw in the towel. I swam 400 more yards but I was feeling pretty funky from the dizziness and the fatigue so I wussed out and left early. I'm still kinda feeling it (like I said, bad news).
No more flip turns for quite a while and I may not swim next Tuesday. Depends on how tired I'm feeling. I hope to pick up a bike on Saturday, which means a bike ride on Sunday (at least) so we'll see.