A month ago, at the final stage of my routine y squat 380lb for 1 rep, based on that maximal y projected the weights for my new routine. Today i supposed to do a set of 5 reps with 330lb( my projected 105% of the 5RM) but i could only do 3; i get worried so i started to do singles adding 10lb every set, unfortunately my 370 single was extremely difficult, which make me realize that i lost 10lb on my squat 1RM. My question is, if this is something that i really must worry about, or is something normal. Any suggestions or opinions are welcome.
Btw, I squat 3 times a week: Monday, Wednesday (front squat) and Friday. I didn't change my diet either.
THanks for your help.