Hydration status,body composition,and anxiety status in aeronautical military personnel from Spain:a crosss-ectional study

Background: An adequate hydration status is critical to ensure efficiency during mental and physical activities.Our goal was to assess the hydration status of a Spanish group of aeronautical military men and to determine the association of hydration status with body composition and anxiety.Methods: A total of 188 men were evaluated through a validated hydration questionnaire, anthropometric and biochemical parameters, and an anxiety questionnaire. Based on these methods, the criteria of hydration were established.Results: Of the total sample, 81% met the hydration criteria(urine color = well hydrated, water balance ≥0 ml, and total water intake/weight ≥35 ml/kg), and 19% did not meet the hydration criteria(urine color = not sufficiently hydrated or dehydrated, water balance <0 ml, and total water intake/weight <35 ml/kg). Subjects not meeting the hydration criteria had lower urine pH, negative water balance, and lower water intake. The latter also had higher anxiety status(score=4 vs. 3, P=0.026), weight [(84.7±10.5) kg vs.(80.5±10.2) kg], body mass index [(26.3±3.1) kg/m;vs.(25.2±2.8) kg/m;], body fat [(22.3±5.6)% vs.(18.3±6.5)%], urine specific gravity, and urine color. Using a logistic binary regression model, hydration status was related significantly with the percentage of body fat(P=0.004), but no relation was found with age, comorbidities, or medications. Furthermore, total water intake/weight was positively correlated with percentage of body water(r=0.357, P=0.000) and negatively with body fat(kg)(r=–0.427, P=0.000), percentage of body fat(r=–0.405, P=0.000), and waist/hip ratio(r=–0.223, P=0.002). Based on a linear regression model, total water intake/weight was related significantly with percentage of body fat(P=0.001) and percentage of body water content(P=0.035). No relation was found, however, with waist/hip ratio, age, comorbidities, or medications.Conclusions: These findings all suggest a relationship between hydration status and body composition but also set the bases for future studies that relate hydration status and anxiety status. These results can be used to improve the hydration status and body composition of military personnel.

The Influence of Career Plateau on Knowledge Hiding of Knowledge Workers

This study takes the cognitive-affective system theory of personality as the whole logic,integrates resource preservation theory and cooperation and competition theory to investigate the influence mechanism of Career Plateau on knowledge workers'knowledge hiding.The results show that career plateau(including its three dimensions:hierarchical plateau,work content plateau and inclusive plateau)has a significant positive impact on status anxiety and knowledge hiding of knowledge workers,and status anxiety plays a complete mediating effect between career plateau(including hierarchical plateau,work content plateau and inclusive plateau)and knowledge hiding of knowledge workers.Cooperative goal dependence positively moderates the relationship between hierarchical plateau and status anxiety,and negatively regulates the relationship between work content plateau and status anxiety.In addition,cooperative goal dependence positively moderates the indirect effect of hierarchical plateau on the knowledge workers'knowledge hiding through status anxiety,and negatively moderates the indirect effect of work content plateau on the knowledge workers'knowledge hiding through status anxiety.The results of this paper provide theoretical support and management enlightenment for further exploring the mechanism of career plateau and knowledge hiding in Chinese enterprises.