I have recently switched gyms, and since I've been in this new one, all my lifts have gone down. At first I didn't think much of it, I noticed that the bench there is much lower than the one in my old gym and even asked a couple questions here about benching in a low set-up, but I have been there for more than 2 weeks now and there's not a single lift that has not gone down, from the big ones to the small ones.
The only noticeable difference between each gym is that the old one had "gym barbells", of 10 kgs, and this new one has olympic barbells, 20 kgs. But I calculate according to that, and still am between 5 to 10 kgs lower than before.
Have this ever happened to anyone?