Hamstring muscle length and lumbar lordosis in subjects with different lifestyle and work setting: comparison between individuals with and without chronic low back pain.
OBJECTIVE
Shortened hamstring muscle length has been noted in persons with low back pain (LBP). Prolonged sitting postures, such as those adopted during different work settings and sedentary lifestyle has been associated with hamstring shortness and LBP. The purpose of this study was to investigate the effect of lifestyle and work setting on hamstring length and lumbar lordosis in subjects with and without LBP and to identify the relationship between hamstring muscles length and lumbar lordosis in individuals with different lifestyle and work setting.


METHODS
A total of 508 subjects between the ages of 20 and 65 were selected. Subjects were categorized into two groups of individuals with and without LBP. A questionnaire was used to obtain information about the subjects' lifestyle and work setting. Hamstring muscle length and lumbar lordosis were measured in all subjects.


RESULTS
The results showed no significant difference in the number of subjects with different work setting or lifestyle in individuals with and without LBP. Hamstring muscle length or lumbar lordosis was not affected by type of work setting and lifestyle. Our data showed significant difference in hamstring length and no significant difference in lumbar lordosis between subjects with and without LBP in all categories. Lumbar lordosis was not different between individuals with and without hamstring tightness in normal and LBP subjects with different work setting and lifestyle.


CONCLUSIONS
The findings of this study did not support the assumption that work setting and sedentary lifestyle would lead to hamstring tightness in subjects with LBP. It seems that work setting and lifestyle was not a contributing factor for hamstring tightness in subjects with LBP.
Department of Physical Therapy, University of Social Welfare and Rehabilitation Sciences, Evin, Tehran, Iran.
Amir Massoud
AM
Arab
Department of Physical Therapy, North Georgia College and State University, Dahlonega, GA, USA.
Mohammad Reza
MR
Nourbakhsh
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008019:Life Style; D008141:Lordosis / Q000503:physiopathology*; D017116:Low Back Pain / Q000503:physiopathology*; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000503:physiopathology*; D011187:Posture / Q000502:physiology*; D017132:Workplace; D055815:Young Adult
Low back pain; hamstring; lifestyle; lumbar lordosis; work setting