Multifidi muscles median frequency before and after spinal stabilization exercises.

Area of Science:

• Rehabilitation medicine
• Musculoskeletal rehabilitation
• Exercise physiology

Background:

• Chronic low back dysfunction (LBD) significantly impacts patient quality of life.
• Multifidi muscle endurance is crucial for spinal stability and LBD management.
• Current exercise programs vary in duration and effectiveness for LBD.

Purpose of the Study:

• To evaluate the impact of a 4-week spinal stabilization exercise program on multifidi muscle endurance and functional status in patients with chronic LBD.
• To assess gender-specific responses to the exercise intervention.

Main Methods:

• A short-term longitudinal cohort study involving 16 patients (10 men, 6 women) with chronic LBD.
• Participants underwent a 4-week supervised spinal stabilization exercise program, 3 times weekly.
• Outcomes measured included functional status via the Oswestry Low Back Pain Disability Questionnaire and multifidi muscle fatigue using electromyography (median frequency during Sorenson test).

Main Results:

• Significant improvement in Oswestry scores (functional status) from pre- to posttreatment (22.9 to 18.3, P<.027).
• A significant gender interaction revealed decreased multifidi muscle endurance in men (149.3 to 143.2, P<.045) and a non-significant increase in women (110.7 to 115.5, P<.20).

Conclusions:

• The 4-week program effectively improved functional status in patients with chronic LBD.
• Unexpectedly, men experienced reduced multifidi muscle endurance, and women showed minimal improvement, indicating the 4-week duration may be insufficient.
• Further randomized controlled trials are necessary to explore optimal program duration and investigate factors influencing treatment outcomes.