Isometric, isotonic, and isokinetic exercises refer to the different techniques for activating and strengthening muscles. Isometric exercises, like planks, involve activating muscles with no movement.

Isometric exercises like wall sits, planks, and glute bridges hold the body in one position for a set period of time. Muscles are contracted and engaged, but they don’t lengthen during the exercise.

Pain in the rhomboid muscles can be caused by ligament sprain, muscle or tendon strain, or muscle spasms. The rhomboid muscles are a group of muscles in your upper back. They are located on either ...