Simplistic answer: I really don't think it's significant enough to matter.
Longer; Mechanistically speaking, low bar squats will promote attenuated patellofemoral compression via requiring less knee extensor torque. This is mainly due to the biomechanics of the position, shifting the lever and allowing your muscles to produce less force for the required torque.
Overall, it may not matter in the end, as both hip and knee joints can tolerate extensive load.
Quote (Darkman @ Dec 2 2014 12:18am)
Wtf do u think?
-lightman, 2O1O, 2O11, 2O12, 2O13, 2O14
Low bar squatters tend to break parallel
High bar tend to go atg (if they're trying)
Low bar tend to be wider stance
High bar tend to be closer
Low bar tends to allow for heavier weights
All the factors can affect your knees
If form is good and you train within your means then knees should be ok.
The light squad will not approve but I'd recommend not going atg, forcing atg can cause breakdown of other parts of ur form.
If ur squatting for the sake of getting a big squat and keeping knees secure, break parallel with low bar
If you want leg development just do leg press ded fkn srs
- ayyylmao
To address this further I'll use this ignorant post to illustrate a point.
His observations are typically correct on the highbar/close stance & lowbar/wide stance. A closer stance will also promote the aforementioned mitigated compression & a wider stance will reduce shear.
So again, in theory low bar is safer for your knees, but I'm not sure if the difference is significant enough. In the long run it may definitely accrete though, seems plausible.
However, no one worry solely about the knees, pls pay attention to your spines too okay. Aka don't compromise form.