Few studies describe the nutritional status of people in stressful situations and with limited access to food. We assessed the dietary intake and serum indices of nutritional status in a sailing crew ( n = 14) during a transatlantic race and in a control group ( n = 11 males). The crew's mean energy intake was 13.3 MJ/d. In both groups, the intake of retinol, thiamin, riboflavin, vitamin C, calcium and iron was sufficient but the intake of vitamin B 6 , magnesium and zinc rather low. In sailors, serum HDL cholesterol was higher before the race (1.61 mmol/l; 95% confidence interval: 1.44–1.69) than after it (1.34 mmol/l; 1.26–1.43). Serum calcium, potassium, magnesium, ferritin, zinc, and selenium concentrations did not indicate nutritional deficiency in either group.
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Fogelholm et al. (1991) studied this question.
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