It's also harder to recover the more total weight you lift, not just relative to your 1RM. So if someone's 1RM is 505 and someone else's 1RM is 135, the person squatting 90% of 505 needs more time to recover than the person squatting 90% of 135.
Hence why I brought up the poundage. There was a video on youtube discussing this at length but I'm too lazy to find it.
How does squatting more often increase your weight? My best squats were 545 for 5, and maybe an inch from regulation depth. I was squatting only once a week. Between that and a heavy deadlift day, it was all my lower back could stand.
Today was 315x8 on the hammer strength incline. I've done 405x6 on it. My shoulders are tight lately, even with warmups and stretching. About a month ago, I was in a rush to get to work, and I was doing a light shoulder day, so I figured I didn't need to stretch. Bad idea. Even though I was going 20% lighter, I was doing more reps. Now when I do a top set on back, chest or shoulders, there's now lots of joint pain.
Basically my thinking is that squatting more often will prioritize those muscles. Squatting once a week has left me with pretty minimal progress over the last couple years.
Americans have this "more is better" mentality to almost everything. More is not usually better, if you are training hard, and natural.
And my point was made when he talks about the elite guys being on drugs and having more available rest time (because they are training all day and have sponsors for income instead of having to work).
I think the most important thing is that Candito states EVERYTHING will work, but NOTHING will work forever.
If your joints can handle it, more power to you. My lower back cannot handle workouts of 500-600 on squat and deadlift more than once a week. And this is when I was younger and had more rest time.
Oddly enough my knees feel better the higher my frequency is. I become tight as dick if I squat 1-2 a week vs 5-6 times.
