I like to do deep overhead squats to warmup and identify any imbalances proir to working out and lately one side of my lumbar tightens after a few reps. I do low weights with a wide grip. I can do back and front deep squats without any problems.
Anybody know what it could be? I know on the side that tightens up, my psoas muscle is tighter than the other leg but i stretch it regularly. Could it be a shoulder issue?
I use overhead squats with a light barbell or stick in order to warm up. However, I foam roll before I perform the overhead squat.
Foam roll your upper back, hip flexors, psoas and any key areas that are tight. Then perform the overhead squats
Your lumbar spine would be tightening in response to a lack of mobility in either your shoulders, upper back, hips, knees or ankles. Assess each of these areas for mobility and once you have identified the problem area stretch out and foam roll the muscle group.
I 2nd what lowey20 says… and, obviously, stop warming up with overhead squats until the exercise is so easy to perform that it becomes a warm-up.
If you are trying to learn olympic weightlifting find a coach nearby or at least pick up some good weightlifting videos. It will save you a lot of time and effort in the long run.