BACKGROUND: Psychosocial factors precipitate and perpetuate the risk of developing long-term low-back pain (LBP) with resultant disability. However, management of psychosocial aspects of LBP still remains a major challenge. This study investigated the effect of static or dynamic back extensors endurance exercise on psychosocial variables of Fear-Avoidance Behaviour (FAB), Pain Self-Efficacy Belief (PSEB) and Back Pain Consequences Belief (BPCB) in patients with LBP. METHODS: A randomized-controlled trial of 67 patients assigned into McKenzie protocol (MP) group (n = 25), MP and static endurance exercise group (MPSEEG; n = 22); and MP and dynamic endurance exercise group (MPDEEG; n = 20) was carried out. Treatment was applied thrice weekly for eight weeks. RESULTS: The groups were comparable in general and baseline psychosocial parameters (p > 0.05). The different regimens had significant effects on all outcome parameters across baseline, 4th and 8th week (p < 0.05). The regimens were comparable in mean change scores on BPCB and FAB at the 4th and 8th week respectively (p > 0.05). MPDBEEG had higher mean change in PSEB at the 4th and 8th week respectively. CONCLUSIONS: McKenzie protocol alone, or in combination with static or dynamic back extensors endurance exercise has comparable effect on FAB, PSEB and BPCB in patients with LBP. The addition of dynamic endurance exercise to the MP led to significantly higher positive effects on PSEB.

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