“Approximately 3,200 kcal could meet the daily energy requirements for physical exercise for a 70 kg person whereas 2,600 calories was sufficient for simple office work. The metabolism of a farm worker during harvesting would require 4,300 kcal. The peak values of the daily calorie consumption for lumberjacks would amount to approximately 6,000 kcal for a 70 kg person. Long-distance racing cyclists,… Read More