Work place countermeasures of night shift fatigue

Night work causes severe sleepiness, reduced performance and increased accident risks. This paper reviews possible countermeasures against sleepiness and finds that short (30 min) sleep episodes and caffeine (100-400 mg, but only up to one night's loss of sleep) still are the favorite methods. Noise is a promising method, and increased light, decreased environmental temperature, and increased physical and mental activity have not been systematically investigated yet, but may come tc, be of use.