ALL EXERCISE IS NOT THE SAME!
There are two types or families of exercise: Global Training and Segmental Training.
An example of global training is a classic squat. An example of segmental training is the ELDOA™ for L5-S1.
There is another level for both types of exercise. We call that Analytical or Qualitative Global Training and Analytical or Qualitative Segmental Training.
An example of an analytical global exercise is the squat with many Factors of Progression. An example of an analytical segmental muscle-building exercise is reinforcement of the gluteus medius, distal fibers.