This Awkward Exercise Fires Up Your Posterior Chain and Improves Your Squat Instantly
"The crab reach is a dynamic movement that improves thoracic spine mobility, strengthens the posterior chain ... stretch ...
BMJ2mon
Cervical muscle strength measurement is dependent on the location of thoracic support
The maximum isometric force of the neck extensor muscles was measured with the thoracic support located at five different levels. The highest level was set at the level of the spine of the scapula ...