It took about 800 miles on my trike to get my hip flexors accustomed to the trike. However, I had not been on any kind of bike for 2 years before getting my trike. Now I feel it in my upper and middle glutes most often.

Now, after 1200 miles, I can still get sore hip flexors if I ride a very long ride or push myself hard or ride more frequently and longer than I ought.

I have contemplated pinning the route sheet to the lower edge of my shorts and using a scrap of elastic around my leg above my knee to hold the other end of the route sheet in place. Have not tried it yet. Often the maps get stuffed under my bra strap.

I use shorter cranks (155) on my trike. My cadence is faster on my trike then it was on my hybrid bike. I've been clipped in since my 2nd ride on the trike but never on the hybrid so that's not a great comparison.

Don't let your ego make you overdo it. If you really strain something and can't ride at all, you'll be really really mad. I know 'cause I've done that several times already!

My average speed over my first year of riding increased by 50% from 8mph to 12mph over the same ride. I'm creeping up on 14mph average for a 15 mile ride. These numbers are on mostly flat rides. Over a long ride (30 miles or more) my average is never over 10. It gets slow like that because I get tired. But I'm more of a tourist than a racer so no worries.

I run out of aerobic capacity on long hills, although I can now charge up shorter ones. Before I had to shift way way down even on the short ones.