I've been doing gymnastics type training on and off for a while. Recently an idea hit me in the face, and I don't know how I didn't notice before. I have always been pretty strong in the planche position and make steady progress. I can hold a decent tuck for about 25 seconds, and an adv tuck for about 5 seconds. I never have any problems with planche and bicep stress. In fact it feels pretty good after I train planche. However, I noticed that when I work the back lever it is very stressful on my bicep, and causes me to have to limit my planche training.This is mostly due to lack of strength in the more extreme ROM of a back lever.
This is a problem because the planche is my goal and I could really care less about the back lever. I know that it is the forces on my stretched bicep that is the problem in the back lever, and I plan to slowly progress. However, I feel that it is worth mentioning that progress can be made on planche without a solid back lever. I may be the exception, but nonetheless it is still possible.