Objective To investigate the current status of central obesity among young male soldiers on warships,and to analyze risk factors and its correlation with metabolic diseases,so as to provide a basis for managing body shape and improving fighting capacity.Methods A total of 531 young male soldiers on warships and 403 young male coast duty soldiers were randomly selected as research objects.Waist circumference(WC),fasting blood glucose,blood lipids and uric acid were measured.The incidences of central obesity and metabolic diseases were compared between soldiers on warships and coast duty soldiers.A questionnaire survey was conducted on the work and lifestyle of soldiers on warships.The risk factors of central obesity and their correlations with metabolic diseases were analyzed.Results The incidence of central obesity in soldiers on warships was higher than that in coast duty soldiers(22.79%vs 9.68%,P<0.001).The incidences of hypertension,hyperlipidemia and hyperuricemia in soldiers on warships were also higher than those in coast duty soldiers(all P<0.05).The duration of vessel stay,sailing time,exercise time,frequency of night meals,intake of beverages,intake of fresh water,intake of carbohydrates,and family history of obesity affected the prevalence of central obesity.More sailing time,less exercise time,higher frequency of night meals,more intake of beverage and carbohydrate,and family history of obesity were risk factors for central obesity among soldiers on warships.Central obesity was associated with many metabolic diseases such as hypertension,diabetes mellitus,hyperlipidemia,hyperuricemia,and fatty liver.Conclusion The incidence of central obesity in young male warship soldiers is higher than that in young male coast duty soldiers.WC is a simple indicator for central obesity.Central obesity is influenced by lifestyle and related to various metabolic diseases.We should strengthen health education of soldiers on warships,improve their lifestyle,manage their body shape reasonably,prevent the development of metabolic diseases,so as to ensure the fighting capacity of troops.