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Chronic low back pain is a very important problem in our civilization. Does a spatial configuration of the vertebral column have an influence on the occurrence of chronic low back pain? Author has compared values of Whitman- Fergusson's angle and Cobb's angle for standing position in-patients and controls. No significant differences between both groups have been founded. Beside of this, inclination od sacrum to a horizontal line has had an influence on a value lumbar lordosis in both groups.
A drop in flexibility of the vertebral column is connected with chronic low back pain. Qualification of vertebral column flexibility is not so simple. Beside of clinical methods (for example Schober test), we can use a radiological method. Comparing values of Whitman- Fergusson's angle and Cobb's angle for standing and supine- lying position, author has stated a significant drop in elastic properties of the vertebral column in patients with chronic low back pain.
The objective of the study was the preliminary recognition of whole body mechanical vibration risk among farmers in the rural work environment. The study covered 15 farms using cultivated land of the size of over 10 ha, carrying out mixed production (plant-animal), equipped with agricultural tractors, and a basic set of tractor-mounted agricultural machinery, with a partial contribution of self-propelled agricultural machines. The scope of the study covered the measurements of effective vibration RMS acceleration (equivalent, maximum, minimum, peak) frequency corrected on the seats of agricultural vehicles in the three spatial directions of vibration (X, Y, Z). These measurements were realized while performing various fi eld and transport work activities during the period of the whole year. A analysis of the peak, maximum and minimum vibration accelerations confi rms that in the agricultural occupational environment there occurs a considerable variation of the vibration values registered. This is also evidenced by high values of the Crest Factor, sometimes exceeding a score of 10. Analysis of the registered equivalent values of vibration acceleration (frequency corrected) from the hygienic aspect showed that vibration occurring on the seats may create risk for farmers’ health while performing such work activities as: tedding and raking of hay, fertilizers spreading, soil aggregation, grass mowing and cultivation. Analysis of the spatial distribution of the measured, frequency corrected vibration accelerations indicates that considerably the highest acceleration values occur in the vertical plane (direction – Z). Literature data clearly confi rm an unfavourable effect of whole body vibration present in agricultural vehicles on discomfort and the occurrence of back pain in the operators, especially in the low back region (lumbar spine), as well as degenerative changes in the spine.
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