So as per my usual routine, I do squats 3 times a week (Mon, Wed, Fri). Each session consists of 3 sets, 1st set = 10reps, 2nd set = 8reps and 3rd set = 6 reps. So this morning I did a warm up of about 5 reps with approx 50kg's. Then I jumped straight into my working set with around 95kg's. With my first working set, it felt a bit awkward and really struggled to get 6 reps out. Normally I would get 10+ on that weight. Second set I got 8 reps, and third set I got 9 reps. It's a bit weird for me as it never happened before. I figured my muscles weren't ready and were overloaded and I should do more heavy warmup set with more reps?