An Assessment of Daily Energy Expenditure of Navy Ship Crews and Officers Serving in the Polish Maritime Border Guard as an Indicator of Work Severity and Nutritional Security

The value of daily energy expenditure related to the implementation of tasks during a cruise amounted to 3874 kcal/d for the crew of a missile frigate, and it was higher at 4031 kcal/d for the crew of a training sailing ship. Energy expenditure related to the training of ship crews staying in a port was lower, amounting to 3648 kcal/d and 3380 kcal/d, respectively. The energy expenditure of the Maritime Border Guard officers during a 12 h shift ranged from 1830 kcal/12 h to 2762 kcal/12 h. Current nutritional standards for sailors of the Polish Navy and the Border Guard officers provide an excessively high energy intake in daily food rations, which may cause overweight and obesity.