Geranium, I don't know the mechanics of how the thyroid and knees interact, but aching knees can be a symptom of hypothyroidism. A lot of people don't know that it is, and most doctors wouldn't suspect it. I had all sorts of physical therapy treatments for my knees that didn't help at all for years. I had to have a whole lot more symptoms before I got diagnosed with hypothyroidism, but once I got on the right medication my knee pain totally disappeared. Weird! Hypothyroidism can cause all sorts of bizarre symptoms. I think theoretically it has something to do with the thyroid hormones affecting collagen production but I'm not a doctor.
I did mostly breaststroke for the few few months of swimming training I did. It took me a while to be able to do a crawl for more than one lap, but now I'm pretty much equally proficient with the two. I'm still slooooooow but nowhere near as slow as I used to be!
Athena, good job practicing with the masters group! I'm afraid to do any group training because I am so slow in all three events.
Last night I had dinner with the friends who convinced me to sign up for triathlon in the first place. I got to check out their fancy tri bike. I seriously think if I tried to ride one of those things I would just fall over and kill myself!

They are just totally in a different class than I am. The only special gear I own is a good pair of running shoes. I went this weekend to our local triathlon store, but it was also really intimidating. The running store people are really friendly to beginners, but the triathlon store people are like, if you're not going to be spending $3000 on a bike, get out of my store. In any case I picked up a thingy to attach a water bottle to my bike, and a "fuel belt." It's this belt thing that you wear that has a water bottle in it and a little pouch for food.
It's snowing here today.

So I think I'm going to hit the pool tonight, since running or biking would be a bad idea. I'm going to try out wearing my sports bra under my swimsuit during the swim, and work on my swim to bike transition.