Measure of the container officers' daily MET, sleep duration and efficiency via metabolic holter.

Objective: This study was conducted to determine energy consumption, sleep durations and sleep efficiency in the work environment of 2nd and 3rd officers on container vessels. Methods: A body tracking monitor which is a multi-sensor wearable technology product was used. It is an armband that provides information about energy consumption, lying and sleeping periods and (MET) metabolic severity of physical activities (BSA: Bodymedia Sensewear Armband Pro3).The study was carried out on the container vessels running between Turkish, Mediterranean and Black Sea ports. A total of 127 daily records were obtained from 8 healthy male volunteers (mean age 25.8, mean BMI 23.8 kg/m2) with BSA. Bodymedia SenseWearPro 6.1 software algorithms were used in the evaluation of data. Results: The 2nd officers were responsible for shifts from 00.00-04.00/12.00-16.00 or 00.00-06.00/12.00-18.00, while the 3rd officers from 08.00-12.00/20.00-00.00 or 06.00-12.00/ 18.00-00.00. 2nd officers' average energy consumption was 3.114 kcal/day (SD±570), daily MET value was 1.6 (SD±0.2). That was 3.523 kcal (SD±762) and 2.0 (SD±0.3) for the 3rd officers'. The average energy consumption of all was 3.320 kcal/day (SD±702); daily MET was 1.8 (SD±0.3); lying time was 7.2 hours/day (SD±2.0); sleeping time was 4.7 hours/day (SD±1.4); sleep efficiency was 66.1% (SD±14.2). A difference was not found between the 2nd and 3rd officers' average lying, sleeping times and efficiency. However, there was a correlation of -0.55 between MET and sleep duration in the 3rd officers,and this value was -0.25 in the 2nd officers. Conclusion: The watchkeeping officers on container vessels in shortsea shipping, are not able to sleep in sufficient efficiency and time.The officers consume more energy and sleep less.This is seen as dangerous for workers and their environment in a ship atmosphere with various risks. It does not coincide with the aims of international resting arrangements for seafarers. In the 3rd officers with higher MET, higher corelation between sleep efficiency and MET suggest that neuroscience needs more studies on the effects of physical energy consumption on the brain. [ABSTRACT FROM AUTHOR]