Lumbar muscle strain, as the name implies, is the fatigue damage to the lumbar spine muscles. It is characterized by tension, spasms, and adhesion of the lumbar muscles, sometimes accompanied by disorders of the lumbar facet joints, straightening of the lumbar curvature, and limited lumbar mobility. Swimming is permissible in such cases because the body is in a weightless state while swimming. This condition allows swimming to strengthen the muscles of the lower back and enhance the muscular strength of the lumbar spine, which can help in exercising and alleviating symptoms. Hence, it is said that one with lumbar muscle strain can swim.