The Risk of Orthorexia and the Prevalence of Emotional Eating Behaviours among Polish Military Flying Personnel in Relation to Body Mass Index (BMI) and Sociodemographic Factors.

BACKGROUND: Proper nutrition has a positive impact on health. Paradoxically, excessive preoccupation with healthy eating may lead to the emergence of abnormal eating behaviours and increase the risk of developing disorders. The aim of this study was to assess the risk of orthorexia (ON) and the prevalence of emotional eating (EE) in military flying personnel of the Polish Air Force in relation to BMI and sociodemographic factors. METHODS: This study included 760 soldiers (including 60 females) taking part in the National Health Programme 2021-2025. The ORTO-15 questionnaire and EEQ were used to assess the risk of ON and EE. RESULTS: The risk of ON occurred in 28.9% of military flying personnel and was significantly more frequent in soldiers with a normal weight (46.4%), under 40 years of age (42.7%), and with higher education (42.7%). The prevalence of EE was found in approximately 12.3% of the respondents and was significantly more common in soldiers with diagnosed obesity (17.5%), women (21.7%), and soldiers with higher education (13.6). Other sociodemographic variables did not differentiate the results of the ORTO-15 questionnaire and EEQ. CONCLUSIONS: The obtained results indicate that the problem of eating disorders also occurs in military populations. The necessity of continuing research in this area is discussed.

Evaluation of health behaviours of Polish Army soldiers in relation to demographic factors, body weight and type of Armed Forces.

OBJECTIVES: The aim of this article is to assess the health behaviors of Polish Army soldiers participating in the National Health Programme 2016-2020 in relation to types of armed forces, BMI and selected demographic factors. MATERIAL AND METHODS: Anthropometric and questionnaire data were obtained in a group of 1229 soldiers of the Polish Armed Forces (PAF) from military units from all over Poland. Health behaviors patterns were assessed using the Health Behavior Inventory (HBI), developed by Juczynski. RESULTS: The HBI of PAF soldiers was 79.9±12.68, indicating an aver- age score. Statistically significant differences were found in the HBI values and in the individual categories of health behaviors according to the type of armed forces. The highest scores in each category of health behaviors were obtained by the Air Force (AF) soldiers. The lowest HBI score was obtained by the Land Forces and Territorial Defence Forces soldiers. Soldiers with higher education obtained significantly higher scores in such health categories as proper eating habits, preventive behaviors and health practices, compared to respondents with secondary education. Soldiers residing in cities had statistically significantly higher health behaviors intensities in all categories, compared to village residents. A significantly higher score in all health categories was noted in soldiers with normal body weight compared to those with diagnosed obesity. There was no significant relationship between the age of the respondents and health behaviors. CONCLUSIONS: The study found that factors such as type of armed forces, BMI, place of residence and education level were significant for the adoption of health behaviors by PAF. The level of health practices was significant- ly higher among AF soldiers compared to other types of armed forces. It seems necessary to further disseminate education on pro-health behaviors, especially among soldiers with obesity through participation in organized training and psychodietetic consultations as part of the National Health Programme. Int J Occup Med Environ Health. 2023;36(4):437-49.

Evaluation of a Fatigue Detector Using Eye Closure-Associated Indicators Acquired from Truck Drivers in a Simulator Study.

This paper presents a camera-based prototype sensor for detecting fatigue and drowsiness in drivers, which are common causes of road accidents. The evaluation of the detector operation involved eight professional truck drivers, who drove the truck simulator twice-i.e., when they were rested and drowsy. The Fatigue Symptoms Scales (FSS) questionnaire was used to assess subjectively perceived levels of fatigue, whereas the percentage of eye closure time (PERCLOS), eye closure duration (ECD), and frequency of eye closure (FEC) were selected as eye closure-associated fatigue indicators, determined from the images of drivers' faces captured by the sensor. Three alternative models for subjective fatigue were used to analyse the relationship between the raw score of the FSS questionnaire, and the eye closure-associated indicators were estimated. The results revealed that, in relation to the subjective assessment of fatigue, PERCLOS is a significant predictor of the changes observed in individual subjects during the performance of tasks, while ECD reflects the individual differences in subjective fatigue occurred both between drivers and in individual drivers between the 'rested' and 'drowsy' experimental conditions well. No relationship between the FEC index and the FSS state scale was found.

Detection of respiratory rate using a classifier of waves in the signal from a FBG-based vital signs sensor.

BACKGROUND AND OBJECTIVE: Monitoring of changes in respiratory rate provides information on a patient's psychophysical state. This paper presents a respiratory rate detection method based on analysis of signals from a fiber Bragg grating (FBG)-based sensor. METHODS: The detection method is based on a system of software blocks that identify notches in the signal waveforms, determine their parameters, and then transmit them to the classifier, which decides which of them are the characteristic waves of the respiratory cycle. The classifier of respiratory waves was developed by means of machine learning methods and using the training data obtained from 10 volunteers (7 males, 3 females, age: 41.1 ±â€¯8.28 years, weight: 73.6 ±â€¯15.25 kg, height 173.5 ±â€¯6.43 cm), who were lying in the tube of a 3-Tesla magnetic resonance imaging (MRI) scanner. RESULTS: In the verification study, aimed at assessing the performance of the method for detecting respiratory rate, 15 subjects (14 males, 1 female, age: 20.2 ±â€¯3.00 years, weight: 75.47 ± 10.58 kg, height 179.13 ± 6.27 cm) were involved. Clinically satisfactory results of respiratory rate detection were obtained: root mean square error of 1.48 rpm and the limits of agreement at -2.73 rpm and 3.04 rpm. The results indicate a high efficiency of the classifier, i.e., sensitivity: 96.50 ± 3.44%, precision: 95.42 ± 2.84%, and accuracy: 92.99 ± 3.37%. CONCLUSION: The all-dielectric sensor acquires the respiration curve and the proposed scheme of computation enables for extracting respiratory rate automatically and continuously. This scheme based on machine learning procedures will be integrated into a system to facilitate non-invasive continuous monitoring of MRI patients.

A study of the relationship between the level of anxiety declared by MRI patients in the STAI questionnaire and their respiratory rate acquired by a fibre-optic sensor system.

Magnetic resonance imaging (MRI) patients often experience anxiety-related respiratory disorders, including hyperventilation, but their respiratory indicators are not routinely monitored during scanning. Free from metal parts and immune to electromagnetic radiation, fibre-optic sensors have the potential to better control the patient's condition by providing continuous non-invasive monitoring of the respiratory rate (RR). The study was purposed to assess the relationship between anxiety in MRI patients and their RR acquired by a fibre-optic sensor system. Forty-four subjects were involved in the study. The mean RR values recorded for 2 minutes immediately after the beginning and immediately before the end of the scanning were assessed relative to the State-Trait Anxiety Inventory (STAI) X-1 scores obtained immediately before and immediately after the scanning, respectively. A growth mixture model analysis was performed to statistically differentiate two groups of subjects according to the trends in repeated measures of RR. A significant lowering of the anxiety state was observed in the group characterised by a decrease in RR, whereas essentially no change in anxiety level was observed in the group with a stable RR. The t-test showed significant differences in changes in anxiety between these groups (t(39) = -2.349, p = 0.012, Cohen's d = 2.13).

Development and evaluation of a novel system for inducing orthostatic challenge by tilt tests and lower body negative pressure.

Lower body negative pressure (LBNP) is a method derived from space medicine, which in recent years has been increasingly used by clinicians to assess the efficiency of the cardiovascular regulatory mechanisms. LBNP with combined tilt testing is considered as an effective form of training to prevent orthostatic intolerance. We have developed a prototype system comprising a tilt table and LBNP chamber, and tested it in the context of the feasibility of the device for assessing the pilots' efficiency. The table allows for controlled tilting in the range from -45 to +80° at the maximum change rate of 45°/s. The LBNP value can smoothly be adjusted down to -100 mmHg at up to 20 mmHg/s. 17 subjects took part in the pilot study. A 24-minute scenario included -100 mmHg supine LBNP, head up tilt (HUT) and -60 mmHg LBNP associated with HUT, separated by resting phases. The most noticeable changes were observed in stroke volume (SV). During supine LBNP, HUT and the combined stimulus, a decrease of the SV value by 20%, 40% and below 50%, respectively, were detected. The proposed system can map any pre-programed tilt and LBNP profiles, and the pilot study confirmed the efficiency of performing experimental procedures.

[The prevalence of overweight and obesity vs. the level of physical activity of aviation military academy students]. / Czestosc wystepowania nadwagi i otylosci u studentów lotniczej uczelni wojskowej a poziom ich aktywnosci fizycznej.

BACKGROUND: The aim of the study was to evaluate overweight, obesity and the level of physical activity in the study group of 100 cadets of the Air Force Military Academy in Deblin (WSOSP). MATERIAL AND METHODS: Evaluation of overweight and obesity was based on body mass index (BMI) and body fat content. An accelerometer AiperMotion 500TM was used to measure the level of physical activity. There were marked such parameters as the average daily energy consumption, the average distance covered during the day and the whole week and the indicator of physical activity level (PAL). RESULTS: Based on BMI indicators, 71.3% of the cadets had normal body weight, 25.3% were overweight and 3.4% were obese. Assessment of nutritional status showed significant differences between the 1st and 2nd vs. the 4th and 5th years of study. Normal BMI values showed 88% of the 1st and 2nd year students, while of the 4th and 5th years - only 48.6% (p < 0.05). Based on the body fat content, obesity was found only in a group of older students (16.2%) and overweight was 10 times higher in the 4th and 5th years (21.6%) in comparison to younger students (2%). The average distance covered during the day or during the whole week was significantly higher in the 1st and 2nd year students. CONCLUSIONS: It is necessary to implement appropriate measures in the field of nutrition and physical activity to prevent the development of excessive body weight during studies among the military cadets of the Air Force Military Academy in Deblin.

Preliminary Results of the LF/HF Ratio as an Indicator for Estimating Difficulty Level of Flight Tasks.

INTRODUCTION: The main aim of this study was to differentiate the magnitude of a pilot's heart rate variability (HRV) when performing assisted and unassisted flights, as well as simple and complex flight tasks. METHODS: Cardiac monitoring in flights was carried out using a compact, mobile ECG recorder. A frequency analysis of the heart rate (HR) signal was performed to determine the ratio of low-frequency spectral power (LF) to high-frequency spectral power (HF). RESULTS: The LF/HF ratio observed in the zone (M=1.047, SD=0.059) was significantly different than the LF/HF calculated preflight (M=0.877, SD=0.043) and postflight (M=0.793, SD=0.037). There was no main effect of the flight type (unassisted zone flight vs. zone flight with an instructor) on the LF/HF parameter. However, greater psychophysiological load of a pilot was observed in the training zone flights when compared to simple circle flights (main effect of the flight type). CONCLUSIONS: As the LF/HF ratio turned out to be significantly higher in the zone than pre- and postflight, this parameter can be useful for predicting the risk of excessive stress and arousal of pilots during flights. Based on the LF/HF ratio we can also estimate difficulty level of flight tasks, because our research has shown higher values of this parameter in the training zone flights than in simple circle flights.

The effects of simulated fog and motion on simulator sickness in a driving simulator and the duration of after-effects.

In the study, we checked: 1) how the simulator test conditions affect the severity of simulator sickness symptoms; 2) how the severity of simulator sickness symptoms changes over time; and 3) whether the conditions of the simulator test affect the severity of these symptoms in different ways, depending on the time that has elapsed since the performance of the task in the simulator. We studied 12 men aged 24-33 years (M = 28.8, SD = 3.26) using a truck simulator. The SSQ questionnaire was used to assess the severity of the symptoms of simulator sickness. Each of the subjects performed three 30-minute tasks running along the same route in a driving simulator. Each of these tasks was carried out in a different simulator configuration: A) fixed base platform with poor visibility; B) fixed base platform with good visibility; and C) motion base platform with good visibility. The measurement of the severity of the simulator sickness symptoms took place in five consecutive intervals. The results of the analysis showed that the simulator test conditions affect in different ways the severity of the simulator sickness symptoms, depending on the time which has elapsed since performing the task on the simulator. The simulator sickness symptoms persisted at the highest level for the test conditions involving the motion base platform. Also, when performing the tasks on the motion base platform, the severity of the simulator sickness symptoms varied depending on the time that had elapsed since performing the task. Specifically, the addition of motion to the simulation increased the oculomotor and disorientation symptoms reported as well as the duration of the after-effects.

Fiber Bragg grating-based sensor for monitoring respiration and heart activity during magnetic resonance imaging examinations.

We present a fiber-optic sensor for monitoring respiration and heart activity designed to operate in the magnetic resonance imaging (MRI) environment. The sensor employs a Plexiglas springboard, which converts movements of the patient's body lying on the board (i.e., lung- and heart-induced vibrations) to strain, where a fiber Bragg grating attached to the board is used to measure this strain. Experimental studies are carried out during thoracic spine MRI examinations. The presence of the metal-free sensor construction in the MRI environment does not pose a threat to the patient and has no influence over the quality of imaging, and the signal is identical to that obtained without any electromagnetic interference. The results show that the sensor is able to accurately reflect the ballistocardiographic signal, enabling determinations of the respiration rate (RR) and heart rate (HR). The data delivered by the sensor are normally distributed on the Bland-Altman plot for the characteristic point determination and exhibit clear dependence on the RR and HR values for the RR and HR determinations, respectively. Measurement accuracies are better than 7% of the average values, and thus, with further development, the sensor will be implemented in routine MRI examinations.