If Your Low Back Hurts After a Ride, It's Time to Pay Attention to This Little Known Muscle
What to know about the quadratus lumborum a.k.a. the QL, a deep low back muscle that can cause pain during rides. These QL stretches and exercises can help.
United States Boulder Physiolab Nicole Haas Spencer Agnew Peak Endurance Performance Physical Therapy
Source: yahoo.com