Acute or subacute perceived low back pain with or without pain radiating to one or both legs, not requiring acute surgical or rheumatological care, low back pain was required to be the dominating symptom, symptom duration of 3 months or less, preceded by at least 2 months of relative freedom from symptoms, consent to treatment and follow-up for 10 weeks, agreement not to consult other therapists during the treatment period, absence of conditions or circumstances that might jeopardize completion of treatment and follow-up, no previous treatment of current complaints with specific mobilization or manipulation, and no previous participation in the present study.