Lower extremity power and strength will be affected by poor stability of core musculature of the spine (other core muscles are shoulder and hip stabilizers). (weckmethod.com)
To do Shoulderstand safely, you need to have strong upper back and lower back muscles, as well as core musculature. (sequencewiz.org)
As your body fights to maintain control, the deep core musculature of your abdominal and back muscles is activated and strengthened. (glutenfreeandmore.com)