I mean I have doubts as to whether you're reaching the proper depth. You can handle more weight if you cut the range of motion short on the squat. I've seen lots of guys quarter squat 405 who can't get to parallel with 135.
I should have said "shallow" instead of "high." Sorry for any confusion. I think we should see a video of both in order to make more informed guesses. Like I said, it's a suspicion, not an accusation. I hope I'm wrong.
And if the grip is the limiting factor on the deadlift, you should sacrifice your thumbs and learn the hook grip. And never forget the old adage "chalk is cheap."
@RichMahogany Thanks. I appreciate the concern and I welcome any constructive criticism. However, Squatting is just a strength of mine (probably the only when it comes to heavy-lifting). I've been doing it for about 10 years while being professionally coached, unfortunately all the while neglecting deadlifts and rows. I'll try to get a video of that as well to impress you
What I'm starting to gather is that I just need to work on my back strength. I used to do do well with pull-ups but now thats gone to hell as well. I'll get my trainer to help with my deads and just start to focus a bit more on strengthening my back.
Looking forward to seeing the videos.
In the meantime, are you squatting high-bar or low-bar? In other words, is the bar resting on your traps (high-bar), or across the rear delts/resting on the spines of your scapulae(low-bar)?
If it's truly a strength deficit (coupled with your anthropometry) that's stopping you from deadlifting more, you can always experiment with heavy partials (e.g. rack pulls & RDL's) as well as trying to add some work over an increased ROM (e.g. Deficit deadlifts). I wonder what Mr. Palfrey would say about either of those ideas.
A couple things that I noticed immediately: 1) I need a tan (I live in Florida for the love) 2) I carry most of my excess fat in my midsection (even lower back) 3) My back does feel weak
You know that poem by W.B. Yeates that ends with "I have spread my dreams under your feet; Tread softly because you tread on my dreams." Yeahhh, this isn't my dream so be brutally honest.