Grade: 3
This feels like a pulled muscle but is in the same place I've had trouble in past years. Previously it was a precursor to back troubles. I had noticed recently getting less flexible but attributed it to weight gain.
This was perplexing. It seemed that I kept re-injuring the pull just while walking around. Mostly that would happen while going up or down stairs. Snows and bad weather kept me inside more so perhaps the rest from that helped heal me enough.