NUTRITION STUDIES DURING N2 -O2 SATURATION DIVING / 营养学报

ABSTRACT

Nutrition studies of saturation/excursion dives were made in a hyper-baric chamber. Seven divers were investigated during a period of 26-day N2-O2 saturation dive to 36.5m with excursion to 60-75m using only air. Daily intake of food was surveyed by regular weighing method. The caloric and nutrient intakes were calculated from Chinese food composition tables. Urine samples were collected for estimation of vitamin B1, B2, 4-pyridoxic acid, ascorbic acid and also nitrogen. During the dive they lost the appe- tite for meat and oil, instead they preferred vegetables, fruits and beverages. Thus energy, protein and lipid decreased and a weight loss was observed. The urinary excretion of certain vitamins was reduced, especially marked with thiamine. Accordingly a suggestion on the allowance of certain nutrients was proposed.