You need to do 15~30 minutes warm-ups.
I think that might have been my issue. Usually I work out in the late afternoon/evening so I'm decently stretched and what not by then. I had so much shit to do yesterday I went as soon as I woke up.
I thought my usual 30 min of cardio would have been a decent warm-up but I guess not. I should work in some stretches or something.
After fucking up my shoulder blades (tendonitis) several times, 30 mins warmups are now mandatory.
I came here to tell you the same thing. I have to warm up before I do work on the house, let alone something like dead lifts. Slow stretching is your friend.