What Krista is saying is practice makes perfect but she isn't saying do an upper body workout every day. She says do a few pushups every day but not a lot and she talks in terms of reps not sets of reps. So basicaly you aren't really stressing your muscles enough that you need a 48 hour recovery.
Also, regarding the form, I went and looked at the jpfitness forums and from what I read, tucking your elbows slightly helps save your shoulders and that the proper form is not to completely tuck your elbows (they can flare out) but they shouldn't be at a 90 degree angle. Although I'd have to go look at the book again. I also some threads on that site referencing Krista's pushup page as something to look at to learn pushups.
Edited to add -
I went and looked at the book and the book shows someone doing pushups with slightly flared elbows although the instructions say keep elbows close to the body. I'm guessing 'close' is relative?
You can't out-exercise poor eating habits.
Last edited by nelie; 03-31-2008 at 11:34 AM.