#quadratuslumborum can be the reason that why you cannot recover from the lower back issues Working over 100 athletes - look into the birken.sports I have identified that QL muscle is the key for successful rehabilitation and managing lower back pain - especially among active athletes QL is the deep muscle that stabilises lumbar spine and initiates - Lateral flexion of vertebral column, with ipsilateral contraction. Extension of lumbar vertebral column, with bilateral contraction (based on line of force passing ~3.5 cm posterior L3 rotation axis) Fixes the 12th rib during forced expiration. - therefore training QL is crucial to build strength in all these movement planes These are the most importantly exercises and plus spinal extension equipment QL raises - that I introduce to athletes to prevent and rehabilitate from back issues #lowerback #lowerbackpain #lowerbackpainrelief #coretrainning