Did a long ride yesterday. My back still hurts. This isn't what concerns me, though, because I think it's due to a lack of core strength.

What does concern me is the following:

1) Knee pain. I've had a fitting done (and the guy spent a long time fiddling with my cleats). We never completely eliminated it, but it hasn't been this bad. It's better if I scoot back on the saddle, but that sets my left knee off, not to mention the extra chafing. (I must remember to buy chamois cream...) Left knee is primarily the outside back on the knee. On the right, it's the front inside and the bottom of the kneecap. I should note that my knees tend to turn toward the top tube, in case that helps.

2) Achilles tendon pain, especially right leg near the ankle. Could it be caused by shoes that are too wide in the heel? Or something else?

3) Asymmetrical sitbone pain and chafing. My left sitbone, on every ride, hurts more than my right. And I get more left-sided chafing than right. It almost feels like I'm not sitting squarely on the saddle...like my right sitbone isn't even on the saddle, though I start off that way, and I somehow even stay that way on the trainer. Is this an issue of core strength? I am extremely right-sided...