Hands locked on spine.

Lie on a belly, under forehead a roll of towel, crossed hands wrists till lock, and finding on spine.
Slowly move crossed hands up along the spine, as shoulders joints allowing, after return back, as exercises doing for two variants.
Isometric as keeping hands locked as maximally possible top pose within 30 sec, after return back, after rest repeat exercise,and whole repeats are three.

Dynamic as slowly alternately raise and low hands ,locked, delay for two sec on edge pose,whole repeats are 12.