"dynamic stabilizers" refer to muscles in our body that help us maintain balance and stability while moving. They work together to keep our bodies steady and prevent falls or loss of control. Full definition
The rotator cuff muscles are dynamic stabilizers of the shoulder joint and they support the ligaments and make the shoulder more stable. (all-about-arm-exercises.com)
Finally, in this exercise, the hamstrings and gastrocnemii muscles are completely secondary, acting as dynamic stabilizers, meaning they won't be affected as much. (fitnessandpower.com)
These muscles are involved in almost every movement of the human body and can act as isometric or dynamic stabilizers for movement, initiate movement by themselves or transfer force from one extremity to another. (fitnessandpower.com)