LBP patients tend to have weak balance because normal sensory information to muscular and sensory organs becomes unnatural, thus obstructing the ability to control balance and weakening waist extensor muscles. In the present study, both groups showed decreased sway length and sway velocity, but the PME group had a greater decrease than the PAE group. The results of this experiment
agree with the findings of previous studies that showed isometric contraction—maintaining the last range of muscular activity for more than 30 seconds—during Pilates exercises increases balance control and strengthens trunk stabilization, increases balance ability and posture stabilization of healthy adults, and strengthens balance control muscles by improving body alignment and increasing static balance
ability of LBP patients.