Occupational health conditions in extreme environments.

The problems of work in extreme environments have been studied for many years. This paper discusses various aspects of work in hot and cold environments and at high pressure.

[Stress among air traffic controllers].

Work stress was assessed by continuous logging of heart rate in 31 air traffic control personnel at seven airports in Norway. The results showed work stress within reasonable limits in all categories of air traffic controllers. Tests of psychomotoric functions in 36 operators revealed that all categories of operative personnel, but the air traffic controllers especially, emphasized accuracy at the expense of speed.

Heart rate increase and maximal heart rate during exercise as predictors of cardiovascular mortality: a 16-year follow-up study of 1960 healthy men.

Background: Resting heart rate is directly associated and maximal exercise-induced heart rate inversely associated with cardiovascular mortality, and therefore their difference might contain prognostic information from both variables. The comparative long-term prognostic values of maximal exercise-induced heart rate and of the difference between it and resting heart rate were studied in apparently healthy middle-aged men.

Methods: Resting heart rate and maximal exercise-induced heart rate were measured, and their difference calculated, in 1960 apparently healthy men aged 40-59 years, and mortality was recorded over a period of 16 years.

Physical fitness as a predictor of mortality among healthy, middle-aged Norwegian men.

Background: Despite many studies suggesting that poor physical fitness is an independent risk factor for death from cardiovascular causes, the matter has remained controversial. We studied this question in a 16-year follow-up investigation of Norwegian men that began in 1972.

Methods: Our study included 1960 healthy men 40 to 59 years of age (84 percent of those invited to participate).