I have not purchased F1 yet (plan to when money is available), but I've read that it doesn't include back lever training.
I am curiousas to why? Because from my own research the back lever seems like a prehab exercise for planche, and is probably the easiest lever (besides human flag). I always thought the back lever and L-sit would come before front lever, Plache and manna.
Is the back lever too stressful on the elbows of a beginner? If so, wouldn't proper German hang work prepare the elbows? Or is that not adequate prehab?