The contractions of the transverse and multifidus muscles
are responsible for maintaining the stability of the
lumbar spine3). Previous studies have demonstrated that
the weakened lumbar muscles in patients with low back
pain, especially the multifidus, do not heal naturally. For
example, Hides et al. indicated that the strength of the most
important deep lumbar stabilizer muscles does not improve
with resistance exercise in patients with low back pain.