While I don’t do it anymore, in my high school and college years I hunted quite a bit. Depending on the terrain, I would routinely have to pack out 100 to 125 p

While I don’t do it anymore, in my high school and college years I hunted quite a bit. Depending on the terrain, I would routinely have to pack out 100 to 125 pounds of meat uphill. Wasn’t running (sometimes shuffling if getting dark or starting to rain/snow), but that much weight on the back isn’t out if the norm. Another anecdote - Up until this past year (I’m 43 going on 44), I was routinely pulling about the same weight as you. I peaked at 637.5 (which still wasn’t enough for a good placement in a meet). I never had back pains or joint pains like yourself. For me, even though I had no pain, the next day, after pulling 600, was just miserable. I had no energy, was sluggish, etc. And yes. I ate. When peaking, I was always eating between 3500 and 4000 calories at 195bw. So I’ve not dead lifted heavy in 6 months. The stress on my central nervous system just isn’t worth it anymore. I’ll keep my lift at about 350 for 10 singles. That’s more than enough for me at this point in my life.