When doing landmine squats or thrusters people often advise to lift the heels off the ground (sometimes called lineman squat). Like here or here
Now it is often said that doing squats and thrusters with a landmine machine like this is much safer and joint friendly than the traditional versions.
However, I am wondering how having heels (naturally) lift off the ground impacts the knee joint.
Is there a reason why lifting the heels off the ground does bring the knee joint or parts of it in a bad position or is bad for the knee for other reasons (compared with traditional squats)? Are there any knee sheering and compression force measurements available with that position? Any study about injury rates with this exercise in particular regarding the knee joint.
