I'm coming to this forum with a fairly advanced yoga background. There we do many movements similar to the movements found here, though the strength foundation is not as emphasized. After years of doing yoga, i believe this is a mistake, and am working to correct it in my own practice and at my yoga school.
For example I encounter many students who can't do a good chaturanga (basically a push up negative). I myself have noticed that compared to you guys i have a long way to go, and wish i'd been taught the path to get there. I don't care too much if i make it to my goals, but i enjoy the work, and the benefits i continually reap from it in my day to day life.
I've seen a few posts here from new comers who have difficulties with the 'basics' in BtGB. For these people i can whole heartedly recommend Convict Conditioning which was just released by Dragon Door. I've been working the program for about a month, and its an excellent way to build a foundation from which to start BtGB.
The book gives what it calls the big six exercises, but then gives progressions that will have a variation that almost anyone can do. Many have also found the simpler variations to be very therapeutic.
The final stages of the Big Six are:
One Hand Push Up
One Legged Squat (Pistol)
One Armed Pull Up
Hanging Leg Raise
Standing Drop Back to Bridge to Standing
One Arm Handstand Push Up (Honestly not sure can ANYONE do this)
Some of these are 'Basic' for Coach Sommers fans, but for normal adults aspiring to this dizzying heights of Coach Sommer's Athletes this is a pretty good starting point. Mostly due to how it teaches to gradually build up through clear progressions.
For example the first stage exercise in the OHPU series is normal push ups at a wall. 3 sets of 50 being the req't to move to step two. That is done with a 2 second lower and 1 second pause at the wall. After that Step two push ups with hands on a table or chair. I've been putting some of my students on this to help with their form and so far i'm really happy with the results.
So for those who teach 'regular' people or if you are having a hard time getting started with BtGB, Convict Conditioning is something to consider.