No clue I really started doing fronts to loosen my hips for back squats. Once I had to end dead lifting they became a staple.
How long?
I have only been adding 5 lbs per week no matter how much more I think I can handle, and haven't missed a 5x5 set yet, but I'm worried I'm gonna start missing them as I approach 225. Did you have any setbacks and at what weight?
Not much pressure on your back
Core engagement is good
Safe if you hit failure.
Biggest challenge is finding the form and best grip.