Cardio Kickboxing and Swimming

I taught the 9:30AM kickboxing class at the Presidio YMCA this morning. I estimate that there were at least 25 people there but I can't claim credit since I was only subbing. I'm so used to teaching my regulars at the Sequoia YMCA that I instinctively pitched up the music. I probably shouldn't have done that since these folks aren't used to highly choreographed KB routines (Turbo Kick). Almost everybody followed very well, although two people who walked out. Oops.

I went home and took a long snooze.

In the afternoon, I went to the Embarcadero YMCA for a swim. I cycled there on Laura's mtb. I practiced zipper switches again and tried swimming some laps. My buoyancy has improved significantly, especially when I'm on my side, but I'm having trouble incorporating breathing: it disrupts my stroking rhythm and I sink. Perhaps it will help if I work on switch drills and rolling all the way to sweet spot.