To estimate the diversity in food choice, 72pieces of magazine which were published 1976 to 1991 including 1, 875 vegetable dish recipes in total were analyzed by analysis of bibliometrics. The recipes were analyzed into foodstuff level and then discussed about diversification according to the sort of foodstuffs, the frequency of foodstuffs and the Diversity Index. The results were as follows; 1. The number of foodstuffs average 8.2 per one vegetable dish. This number has gradually decreased from 1979 to 1991. 2. As regards the sort of foodstuffs “vegetable and its processed foods” in the classification is the most, and observed 104 kinds of vegetable per year in average. 3. As regards frequency, “various kinds of seasoning” in the classification is the most, and it became certain that these sorts of foodstuff are used more frequently than another foodstuffs in the vegetable dishes. 4. As regards Diversity Index, big changes have not taken place during these sixteen years except 1976. 5. There is a high correlation between Diversity Index and frequency cumulative of several foodstuffs which are situated in the top rank in Cumulative Relative Frequency Distribution.
The present study was designed to investigate changes in sodium (Na), potassium (K), calcium (Ca), magnesium (Mg) and phosphorus (P) balances during five days of 1 hr or 2hrs/day of exercise under the dietary conditions maintaining nutrient intakes per 1, 000 kcal of energy intake. Five healthy men served as the subjects. The experiment consisted of each 5 days of 1st and 2nd exercise period, preceded by 6 days of rest period. On the exercise period, exercise was loaded for 60 min (1st period) or 120 min (2nd period) with a bicycle ergometer at a target intensity of 60% of VO2max. Extra energy intake was calculated in proportion to energy consumption by additional exercise. The increase in sweat Na, K, Ca and Mg excretions over the levels on the rest period was lower than the increase in these intakes. Na and P retention due to decrease in urinary excretion was observed, but K, Ca and Mg balances were unchanged. Urinary aldosterone excretion and serum parathyroid hormone (PTH44-68) were slightly increased. These results suggested that the dietary method maintaining nutrient intakes per 1, 000 kcal of energy intake during exercise is reasonable in these minerals.