Why is the QL commonly tight in so many people based on the research? ADVERTISEMENT 282 viewsJune 15, 2012 0 Chris0 June 15, 2012 0 Comments one of the four dynamic stabilizers of the spine 2 Answers ActiveVotedNewestOldest 0 Bryant0 Posted 0 Comments Wild guess but going with sitting most of the day. 0 Gail0 Posted 0 Comments I agree with Bryant-it is from being in a seated position for so many hours during the day. The erector spinae gets weak and unable to extend the lower back and the QL functions in this capacity. The QL gets overworked and becomes short and tight. Register or Login