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The variation in heart rate (HRV) at rest and during deep breathing (6 cycles a minute) of 88 professional lumber jacks was studied using a computer technique. The traditional indexes of HRV (CV, CVS, MEAN) were calculated and the spectral components of the HRV were also computed. There was a significant difference (p less than 0.001) between the HRV indexes during the deep breathing test in those with the shortest (CV = 10.1 +/- 1.1) and those with the longest (CV V 6.2 +/- 0.4) exposures to vibration. The values of the HRV indexes decreased with age, but multiple regression analysis showed that the total exposure time to vibration had an independent negative association with the HRV. There were significant differences in all the frequency bands (frequency related power, FRP) of the heart rate between those with the longest and those with the shortest exposures. The HRV during a deep breathing test is associated with the activity of the parasympathetic nervous system and is decreased in autonomic neuropathies. Our results suggest that prolonged exposure to the vibration caused by a chain saw has a negative effect on the parasympathetic activity and thus causes autonomic dysfunction.
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
March 1985,
Acta neurologica Scandinavica,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
November 2000,
International archives of occupational and environmental health,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
February 1996,
Central European journal of public health,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
January 1995,
Central European journal of public health,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
March 1988,
British journal of industrial medicine,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
September 1983,
Sangyo igaku. Japanese journal of industrial health,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
August 1986,
Scandinavian journal of work, environment & health,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
January 2002,
AIHA journal : a journal for the science of occupational and environmental health and safety,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
January 1977,
Medycyna pracy,
E Heinonen, and
M Färkkilä, and
J Forsström, and
K Antila, and
J Jalonen, and
O Korhonen, and
I Pyykkö
July 1999,
Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology,
