Today a friend of mine came along to work out together. He's been getting fit over the last year and a half and has done some great progress with functional exercises. He recently started to delve into crossfit and got interested in bodyweight and gymnastic training.
I was going over the basic Hollow body / Arched body principles, shoulder retraction / opening the shoulders in some exercises, and how important they are at the core of every other movement.
One thing became immediately clear, he was struggling with some very basic principles. I was at a loss because I never actually experienced the type of difficulty he was having.
In short he could keep a hollow hold on the floor, but had immense difficulty in pushing the pelvis forward to really have that arch in the lower back. He could not hold a proper hollow in a plank or while hanging from a bar. At first I thought it as a lack of core strength but it seems it was compounded by a lack of mobility.
He was clearly in need of a lot of flexibilty and mobility work but I had a tough time believing lack of mobility impeding the ability to push your pelvis forward.
The second thing that had me at a total loss was his inability to protract the shoulders and squeeze the scapula together while keeping his arms straight. His arms would bend at the elbows if he tried to squeeze the scapula together.
Needless to say we spend the rest of the day doing stretching, and trying to open up his hams and shoulders.
Is this even possible? I'm thinking I was not able to get his body to 'understand' the movement, rather than lack of mobility but I'm curious to see if this can truly be because of a lack of mobility.