I've discovered something. It is sort of a 'duh' moment for some... but it is still a discovery for me nonetheless. You see, I always start my squat training by warming up with 20kg for 3 sets of 8 reps. The pattern would go somewhat like this:
20kg x 8 reps (3 sets)
40kg x 8 reps (3sets)
45kg x 8 reps (2 sets)
53kg x 8 reps (2 sets)
By the time I hit the final set I'm already quite spent so I always felt 55kg was very challenging. Even at just an extra 2kg it felt really heavy on my back.
Yesterday however, I was a bit lazy. The bar was already loaded up with 10kg plates on each side. So I squatted 28kg (standard bar is 8kg) as my warmup instead of the regular 20kg. The bar felt surprisingly light.
The rest of the workout went like this:
40kg x 8 reps (2 sets)
48kg x 8 reps (2 sets)
53kg x 8 reps (1 set)
55kg x 7 reps (1 set)
I did far less sets than I usually do. But it's made slightly more intense by the bigger jump between weights. Funnily enough I felt fine and didn't feel as tired as I usually feel after a squat session. On hindsight I realize that less sets mean more energy to push heavier. But I guess it's my mind playing games on me.
I'd feel comfortable lifting the usual weights I lift. I should change it up a bit. And I should have hit the 8th rep of the last set.
Must remind myself not to be a sissy the next time round.