Effects of three different training modalities on the cross sectional area of the lumbar multifidus muscle in patients with chronic low back pain

L A Danneels¹, G G Vanderstraeten¹, D C Cambier¹, E E Witvrouw¹, J Bourgois², W Dankaerts¹, H J De Cuyper³

¹ Department of Rehabilitation Sciences and Physical Therapy, Faculty of Medicine, Ghent University, Belgium
² Centre of Sports Medicine, Ghent University Hospital, Belgium
³ Department of Physical Medicine and Rehabilitation, Hospital Jan Palfijn-Campus Gallifort, Antwerp, Belgium

Correspondence to:
Correspondence to: Mr Danneels, University Hospital Gent, Department of Rehabilitation Sciences and Physical Therapy, De Pintelaan 185, 1B3, B-9000 Ghent, Belgium lieven.danneels{at}rug.ac.be

Objectives—To determine the effect of different training schedules on the cross sectional area (CSA) of the lumbar multifidus muscle in patients with chronic low back pain.

Methods—Each of 59 nine patients was randomly assigned to one of three programmes: 10 weeks of stabilisation training (group 1; n = 19); 10 weeks of stabilisation training combined with dynamic resistance training (group 2; n = 20); 10 weeks of stabilisation training combined with dynamic-static resistance training (group 3; n = 20). Before and after 10 weeks of training, multifidus CSAs were measured from standard computed tomography images at three different levels (upper end plate of L3 and L4, and lower end plate of L4).

Results—The CSA of the multifidus muscle was significantly increased at all levels after training in group 3. In contrast, no significant differences were found in groups 1 and 2.

Conclusions—General stabilisation exercises and dynamic intensive lumbar resistance training have no significant effect on the CSA of the lumbar multifidus muscle in patients with chronic low back pain. The static holding component between the concentric and eccentric phase was found to be critical in inducing muscle hypertrophy during the first 10 weeks. Treatment consisting of stabilisation training combined with an intensive lumbar dynamic-static strengthening programme seems to be the most appropriate method of restoring the size of the multifidus muscle.

Key Words: back pain; multifidus muscle; stabilisation; dynamic; dynamic-static; hypertrophy

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