To be fair, as a powerlifter, I suspect you are highly adapted to maximising peak power, rather than prolonged power over 400 - 1000 squats. I would think that

To be fair, as a powerlifter, I suspect you are highly adapted to maximising peak power, rather than prolonged power over 400 - 1000 squats. I would think that anything above 100 largely becomes an endurance exercise which requires a very different adaptation. As a 48yo rower, I can do IRO 300 squats before feeling the burn too badly, but then I have been doing endurance-type training for the past 35 years. I have known lightweight rowers who were pretty much unlimited in the number they could do in 1 hit. Their only limit was needing to eat/sleep/etc!