Key result
Long-haul truck driving was associated with significant acrophase advances in arterial pressure and heart rate compared to air traffic controllers (N=12 per group).
Why the study?
Does extended working time during long-haul truck driving alter circadian rhythms of arterial pressure, heart rate, and oral temperature compared to air traffic controllers?
Observational (n=24)
Does extended working time during long-haul truck driving alter circadian rhythms of arterial pressure, heart rate, and oral temperature compared to air traffic controllers?
Extended working time during long-haul truck driving may cause internal desynchronization of circadian rhythms for blood pressure, heart rate, and temperature.
May signal occupational circadian disruption in drivers; hypothesis-generating for CV risk, needs larger prospective validation before practice implications.
Circadian rhythms of arterial pressure (AP), heart rate (HR) and oral temperature (OT) were studied in healthy male truck drivers and in a control group of air traffic controllers. Twenty-four-hour records of systolic and diastolic AP and HR and of OT were obtained from 12 truck drivers both during the outward and homeward journey in Europe and Asia, and from 12 air traffic controllers during a morning shift. Data were analyzed by the cosinor method. The results obtained in the control group were as follows (mesor/amplitude/acrophase): systolic AP (mm Hg): 111.1/6.1/16.51 h; diastolic AP: 68.4%5.6/16.58 h; HR (b.p.m.): 77.07/7.6/17.46 h; OT (dg C): 36.74/0.21/17.26 h. Statistically significant acrophase advances were observed for the circadian rhythms of systolic, diastolic and mean AP and of HR in TD during the outward journey in comparison with the control ATC group. These differences were still present during the homeward journey, in combination with an acrophase delay of the circadian rhythm of OT. Our results supply grounds to suppose that extended working time combined with greater load during a long-lasting trip may act to generate an internal desynchronization of circadian rhythms in long-haul truck drivers.
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Stoynev et al. (1997) conducted an observational in Healthy (n=24). Long-haul truck driving vs. Air traffic controllers was evaluated on Circadian rhythms of arterial pressure, heart rate and oral temperature. Long-haul truck driving was associated with significant acrophase advances in arterial pressure and heart rate compared to air traffic controllers (N=12 per group).
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