Serious question:
can you accomplish the same results without doing squats or that lunge-type movement in the video?
If you can, is it really worth it to put 450 pounds on your back? It just seems like a lot of broscience--you need to do X movement for Y results. With so much modern advancement in weight training, there has to be something safer. No?
We vary our single leg movements. We do lower body twice a week. For example, on day one (aside from our main lift) we will add a step up variation instead of a squat or lunge variation to avoid joint stacking. On the second leg day, 3 days recovery, most of the time use one heavier unilateral movement as a main lift keeping the reps at 2/3. This is what was done yesterday. After field work warmups and core.
1A) Split Squat w/yoke bar 5x5, 3, 3, 3
1B) Clean pull - 4x3 @ 70%
1C) Corrective exercise in this case it was a banded Achilles stretch as an active recovery 4x:30ea
2A) Back Extension w/iso hold of 2 - 3x10
2B) Single Leg slideboard pull ins 3-0-1 tempo - 3x10
2C) Corrective exercise, in this case it was a TKE (terminal Knee Extension) w/band -3x20