Meta-analysis: exercise therapy for nonspecific low back pain.

Area of Science:

• Rehabilitation Medicine
• Physical Therapy
• Evidence-Based Practice

Background:

• Low back pain (LBP) is a prevalent condition managed with various interventions.
• Exercise therapy is a common and widely utilized treatment approach for LBP.

Purpose of the Study:

• To systematically evaluate the efficacy of exercise therapy for adult nonspecific acute, subacute, and chronic low back pain.
• To compare exercise therapy against no treatment and other conservative interventions.

Main Methods:

• A comprehensive literature search was conducted across multiple databases (MEDLINE, EMBASE, PsychInfo, CINAHL, Cochrane Library) up to October 2004.
• Inclusion criteria focused on randomized controlled trials (RCTs) assessing exercise therapy for adult nonspecific LBP, measuring pain, function, return to work, and global improvement.
• Data extraction and study selection were performed independently by two reviewers, assessing study characteristics, quality, and outcomes at various follow-up intervals.

Main Results:

• Sixty-one RCTs involving 6390 participants were analyzed, categorized by LBP duration: acute (11 trials), subacute (6 trials), and chronic (43 trials).
• Exercise therapy demonstrated effectiveness in chronic LBP across all follow-up periods, with pooled mean improvements of 7.3 points for pain and 2.5 points for function.
• In patient-seeking-care populations, improvements were more pronounced (13.3 points for pain, 6.9 points for function). Evidence for subacute LBP was inconsistent, while acute LBP showed exercise therapy to be equally effective as other conservative treatments.

Conclusions:

• Exercise therapy shows modest efficacy in reducing pain and enhancing function for chronic low back pain, particularly in healthcare-seeking populations.
• For subacute LBP, graded-activity programs show some promise for improving absenteeism, though evidence for other exercise types remains unclear.
• In acute LBP, exercise therapy provides comparable outcomes to no treatment or other conservative interventions, but study limitations necessitate cautious interpretation.