[Blitzzz (RIP)]

First of all the major strength of a muscle bundle is in the middle 60% with the weakest portions at the ends. You can notice how folks will cheat a little to get a curls started or to push up out of a squat to gain momentum for the lift.
That's why many will do Isotonic squats with 4 second movements through range.

I have seen way too many knees injured through "MaX" weight squats. Remember the more resistance through a joint the more compressed it becomes thus cartilage damage and tendonitis and ligament strains.
By building too much muscle strength first, the tendon and ligaments don't have sufficient time too adjust to the new power running through them and this causes tendonitis and ligament strains and ruptures.
If I'm working with a person who cannot rise from a deep squat then I start them doing Blitz type reps on a total gym set at the lowest position the person can lift from. the reps they do are from deep (ass on heels) to a 90Degree seated position.

When they're stronger then they can elevate the TG until they are at the 100% level. Then I start them doing "Full" squats.
The thigh muscle are doing the extension of the knee joint and are weakest in the end range of the squat. Strengthen that end first without damage to the cartilage.
remember , in all the Blitz exercising, the sinovial fluid movement is greatly enhanced. Great for repair and lug of movement.
Frankly it is hard to achieve the heavier squat weights without first developing the initial movement strength.


Dave