Lumbar spinal moments in chronic back pain patients during supported lifting: A dynamic analysis
Objectives: The main objective of this study was to test the hypothesis that peak L4/L5 moments (torque) placed on the lumbar spine by chronic back pain subjects are reduced using pain-reducing postural adaptations. A secondary objective was to determine the relation between lumbar moments while lif...
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Veröffentlicht in: | Archives of physical medicine and rehabilitation 1997-09, Vol.78 (9), p.967-972 |
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Sprache: | eng |
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Zusammenfassung: | Objectives: The main objective of this study was to test the hypothesis that peak L4/L5 moments (torque) placed on the lumbar spine by chronic back pain subjects are reduced using pain-reducing postural adaptations. A secondary objective was to determine the relation between lumbar moments while lifting and self-reported ratings of lower back pain.
Study Design: Cohort using seven men with a history of chronic lower back pain. An inverse dynamic model was used to calculate L4/L5 forces and moments while performing five trials each of two lifting styles. Subjective ratings of lumbar back pain were taken before and after the lifts.
Results: Significant (
p < .001) differences were found between lifting postures on peak L4/L5 net reaction moments. Two distinct lifting profiles emerged characterized by the amount of lumbar spinal extensor musculature involved. Significant (
p < .05) increases in pain were found after a bowed-back lifting style.
Conclusions: Peak L4/L5 net reaction moments were less (spine extensor loading) for a lifting posture that produced lower levels of self-reported lower back pain. The dynamic model proved reliable and useful for future study of the pathomechanics of lower back pain. |
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ISSN: | 0003-9993 1532-821X |
DOI: | 10.1016/S0003-9993(97)90059-9 |