scholarly journals Quantifying the Effect of Mental Stress on Physical Stress for Construction Tasks

2022 ◽  
Vol 148 (3) ◽  
Author(s):  
Waleed Umer ◽  
Yantao Yu ◽  
Maxwell Fordjour Antwi Afari
Keyword(s):  
Mental Stress ◽  
Physical Stress ◽  
Construction Tasks

scholarly journals Effects of Daily Intake of Almonds on Cardiac Autonomic Functions Measured by Heart Rate Variability in Response to Acute Stress: A Randomized Controlled Trial

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 20-20
Author(s):  
Vita Dikariyanto ◽  
Leanne Smith ◽  
May Robertson ◽  
Eslem Kusaslan ◽  
Molly O'Callaghan-Latham ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Mental Stress ◽  
Autonomic Function ◽  
Acute Stress ◽  
Physical Stress ◽  
Cardiometabolic Health ◽  
Cardiac Autonomic Function ◽  
Randomized Controlled

Abstract Objectives Stress is inversely associated with heart rate variability (HRV), an indicator of cardiac autonomic function and a predictor of risk of sudden cardiac death. At times of stress, people tend to favor high sugar and fatty foods, often as snacks, with potential adverse effects on cardiometabolic health. Dietary recommendations for cardiovascular disease (CVD) prevention emphasize fruits, vegetables, wholegrains and nuts. There is evidence that consumption of nuts can reduce LDL cholesterol and blood pressure and help with weight management, however the impact of nuts on HRV in response to stress is unknown. The ATTIS dietary intervention study investigated the HRV response to acute stress following 6-week substitution of almonds for typical snacks high in refined starch, free sugars and saturated fats, and low in fibre. The study population comprised adults aged 30–70 y, who were habitual snack consumers, and at moderate risk of developing CVD. It was hypothesized that snacking on almonds would increase HRV during stress tasks, when HRV is expected to be reduced due to increased sympathetic activity. Methods A 6-week randomized controlled parallel trial was conducted. Participants were randomized to 1) control snacks (mini-muffins formulated to follow the average UK snack nutrient profile), or 2) dry-roasted whole almonds, both providing 20% estimated energy requirement. Supine HRV was measured (Mega Electronics Emotion Faros 180°, 2-leads wearable ECG-HRV monitor) during resting (5 min), physical stress (blood pressure monitor cuff inflation 200 mmHg, 5 min) and mental stress (Stroop colour-word test, 5 min) tasks pre- and post-intervention. A total of 105 participants (73 females and 32 males; mean age 56.2 y, SD 10.4) completed the trial. Results Almonds significantly increased the beat-to-beat HRV parameter, high-frequency power, during the mental stress test (mean difference 124 ms2; 95% CI 11, 237; P = 0.031) relative to control, indicating increased parasympathetic regulation. There were no treatment effects during resting and the physical stress task. Conclusions Snacking on whole almonds as a replacement for typical snacks increases HRV during mental stress, indicating an increased resilience in cardiac autonomic function and a novel mechanism whereby nuts may be cardioprotective. Funding Sources Almond Board of California.

Model approach for stress induced steroidal hormone cascade changes in severe mental diseases

2016 ◽  
Vol 25 (3) ◽  
Author(s):  
Claus D. Volko ◽  
Pedro A. Regidor ◽  
Uwe D. Rohr
Keyword(s):  
Mental Stress ◽  
Well Being ◽  
Physical Stress ◽  
Common Denominator ◽  
Blood Capillary ◽  
Marathon Runners ◽  
Steroidal Hormone ◽  
Specific Immunity ◽  
Mental Diseases ◽  
The Impact

Abstract: Stress was described by Cushing and Selye as an adaptation to a foreign stressor by the anterior pituitary increasing ACTH, which stimulates the release of glucocorticoid and mineralocorticoid hormones. The question is raised whether stress can induce additional steroidal hormone cascade changes in severe mental diseases (SMD), since stress is the common denominator.: A systematic literature review was conducted in PubMed, where the steroidal hormone cascade of patients with SMD was compared to the impact of increasing stress on the steroidal hormone cascade (a) in healthy amateur marathon runners with no overtraining; (b) in healthy well-trained elite soldiers of a ranger training unit in North Norway, who were under extreme physical and mental stress, sleep deprivation, and insufficient calories for 1 week; and, (c) in soldiers suffering from post traumatic stress disorder (PTSD), schizophrenia (SI), and bipolar disorders (BD).: (a) When physical stress is exposed moderately to healthy men and women for 3–5 days, as in the case of amateur marathon runners, only few steroidal hormones are altered. A mild reduction in testosterone, cholesterol and triglycerides is detected in blood and in saliva, but there was no decrease in estradiol. Conversely, there is an increase of the glucocorticoids, aldosterone and cortisol. Cellular immunity, but not specific immunity, is reduced for a short time in these subjects. (b) These changes are also seen in healthy elite soldiers exposed to extreme physical and mental stress but to a somewhat greater extent. For instance, the aldosterone is increased by a factor of three. (c) In SMD, an irreversible effect on the entire steroidal hormone cascade is detected. Hormones at the top of the cascade, such as cholesterol, dehydroepiandrosterone (DHEA), aldosterone and other glucocorticoids, are increased. However, testosterone and estradiol and their metabolites, and other hormones at the lower end of the cascade, seem to be reduced. 1) The rate and extent of reduction of the androgen metabolites may cause a decrease of cellular and specific immunity which can lead to viral and bacterial infections; joint and stomach inflammation; general pain; and allergic reactions. 2) The decrease in testosterone, and estradiol in SMD may have detrimental effects in cell repair as the estradiol metabolite, 2-methoxy-estradiol (2ME2), helps to transforms stem cells into functional cells. As dopamine and 2ME2 are inversely metabolized via various forms of catechol-O-methyl transferase (COMT), well-being and hypertension may be related. 2ME2 is related to vascular endothelial growth factor (VEGF), which regulates blood capillary growth and O: Increasing mental and physical stress is related to systematic deviations in the steroidal hormone cascade in the non-psychotic state, which then may cause life threatening co-morbidities in PTSD, SI, and BD.

scholarly journals Response of the QT interval to mental and physical stress in types LQT1 and LQT2 of the long QT syndrome

Heart ◽  
2001 ◽  
Vol 86 (1) ◽  
pp. 39-44
Author(s):  
K J Paavonen ◽  
H Swan ◽  
K Piippo ◽  
L Hokkanen ◽  
P Laitinen ◽  
...  
Keyword(s):  
Heart Rate ◽  
Serum Potassium ◽  
Long Qt Syndrome ◽  
Qt Interval ◽  
Mental Stress ◽  
Physical Stress ◽  
Exercise Stress ◽  
Long Qt ◽  
Qt Intervals ◽  
Qt Syndrome

OBJECTIVETo study and compare the effects of mental and physical stress on long QT syndrome (LQTS) patients.DESIGNCase–control study.MAIN OUTCOME MEASURESQT intervals were measured from lead V3. Serum potassium and plasma catecholamine concentrations were also monitored.PATIENTS16 patients with type 1 LQTS (LQT1), 14 with type 2 LQTS (LQT2), both groups asymptomatic, and 14 healthy control subjects.INTERVENTIONSThree types of mental stress tests and a submaximal exercise stress test.RESULTSHeart rate responses to mental stress and exercise were similar in all groups. During mental stress, the mean QT interval shortened to a similar extent in controls (–29 ms), LQT1 patients (–34 ms), and LQT2 patients (–30 ms). During exercise, the corresponding QT adaptation to exercise stress was more pronounced (p < 0.01) in healthy controls (–47 ms) than in LQT1 (–38 ms) or LQT2 patients (–38 ms). During exercise changes in serum potassium concentrations were correlated to changes in QT intervals in controls, but not in LQTS patients. LQT1 and LQT2 patients did not differ in serum potassium, catecholamine or heart rate responses to mental or physical stress.CONCLUSIONSQT adaptation to mental and exercise stress in healthy people and in patients with LQTS is different. In healthy people QT adaptation is more sensitive to physical than to mental stress while no such diverging pattern was seen in asymptomatic LQTS patients.

scholarly journals Stress of Working Women

2016 ◽  
Vol 3 (4) ◽  
Author(s):  
Dr. Latika Varma
Keyword(s):  
Heart Disease ◽  
Mental Stress ◽  
Working Women ◽  
Modern Society ◽  
Physical Stress ◽  
Physical Disease ◽  
Maladaptive Behaviour ◽  
Deadly Disease ◽  
As Stress ◽  
The Individual

Stress is a major problem of today’s modern society. It has been proved through recent studies that 75%  of diseases occur due to mental stress, The deadly disease like heart disease and cancer too is related to stress. Now what is stress? Psychologists have in many ways tried to define stress. The reason of mental stress has been made clear. Here, stress means the factor or event or cause through which there is mental disequilibrium, tension and maladaptive behaviour in the individual. Reber (1995) ahs rightly defined stress as “Stress, generally is any force that when’ applied to a system causes some significant connotation that the modification of its forms, usually with the connotation that the modification is a deformation or a distortion. There is a stress provoking situation or event, which causes stress in an individual. It causes mental agony, worthlessness, frustration, depression and so on. This stress provoking situation can be physical, social or psychological, e.g. :- Physical disease, fatigue, pain etc. are the examples of Physical stress.

scholarly journals Stress among Parents of Children with Mental Retardation

2013 ◽  
Vol 12 (1) ◽  
pp. 74-80 ◽  
Author(s):  
Md Ziaul Islam ◽  
Sharmin Farjana ◽  
Runa Shahnaz
Keyword(s):  
Mental Retardation ◽  
Mental Stress ◽  
Medical Science ◽  
Mentally Retarded ◽  
Cross Sectional Study ◽  
Physical Stress ◽  
Cross Sectional ◽  
Stress Score ◽  
Mentally Retarded Children ◽  
And Gender

Mental retardation is one of the most prevalent developmental disabilities of the children globally. Family is the main source of support for those disable children in any society. Parents experience enormous physical and mental stress to tackle the mentally retarded children. This present comparative cross-sectional study tried to compare difference of mental and physical stress between the parents of children with mental retardation and the parents of children with no mental retardation. It included 220 parents, 110 of whom had children with mental retardation and another 110 parents of children with no mental retardation. To assess stress, A Quick Stress Assessment Test (QSAT) (Vaz, 1995) was used, which comprised two parts: physical and mental, former with 19 items and latter with 21 items. Data were collected with a self-administered questionnaire and analyzed by using SPSS software. To check differences of stress scores and gender differences of stress,‘t’ test and ‘?2’ tests were applied as required. The study revealed that the parents of children with mental retardation (PCMR) shared significantly greater stress score (34.27) than the parents of children with no mental retardation (PCNR) (21.66), [t(218)= 2.63, p=0.001]. Mental stress score was significantly higher among PCMR (33.57) than the PCNR (26.46) [t(218)= 3.87; p=0.002] while physical stress score was insignificantly higher among PCMR (20.43) than the PCNR (18.66). Majority of the parents with mentally retarded children (71.4% mothers and 67.5% fathers) had higher mental stress than physical stress [?2 (1)=22 43, p=0.024]. Mothers had significantly higher mental stress score than the fathers of mentally retarded children [‘t’(109), p=0.025]. Special measures like early diagnosis, prompt treatment and counseling for mental and physical stress of the parents along with provision of need based rehabilitation services for the mentally retarded children at different levels to reduce the stress burden of their parents. DOI: http://dx.doi.org/10.3329/bjms.v12i1.13354 Bangladesh Journal of Medical Science Vol. 12 No. 01 January’13 pp.74-80

Low Work Load During Physical Stress Testing Is Mental Stress Testing

1984 ◽  
pp. 222-228
Author(s):  
H. Rüddel ◽  
M. E. McKinney ◽  
J. C. Buell ◽  
R. S. Eliot ◽  
H. Otten ◽  
...  
Keyword(s):  
Mental Stress ◽  
Stress Testing ◽  
Work Load ◽  
Physical Stress

Difference of thermal patterns of the face and neck regions in states of physical and mental stresses

2021 ◽  
Author(s):  
S.S. Zhumazhanova
Keyword(s):  
Standard Deviation ◽  
Respiratory Rate ◽  
Mental Stress ◽  
Physical Stress ◽  
Color Test ◽  
Frequent Change ◽  
Average Value ◽  
The Face ◽  
Thermal Patterns ◽  
High Level

Systems for remote detection of a person's state today have enormous potential, but the identification features of states in each system are different. States of mental and physical stress have a huge impact on the performance of the operator's work tasks, and it is important to distinguish between them. The purpose of the work is to review research on identifying states of physical and mental stress by analyzing the temperature of the subject's face and body; conducting experiments aimed at inducing a state of mental stress using the Stroop verbal-color test and physical stress after exercise and analyzing the main differences between the states and the perspectives for their use. Significant differences were found between the mean temperatures of the areas under physical stress and the standard deviation of temperatures under mental stress. The research results can be applied in applications, monitoring systems for the state of operators of complex technical and technological facilities. Stress is as a high level of emotional arousal, usually associated with mental or physical stress. To determine the stressful state of a person, a continuous analysis of physiological signals – ECG, EEG, skin temperature, respiratory rate is carried out. To overcome the limitations associated with the use of contact sensors for recording physiological parameters, methods of computational psychophysiology based on IR-imaging have been used recently. A review of the work on the formation of a thermal picture during and after physical and mental stress is provided. Experiments were carried out to register changes in the thermal patterns of the face and neck regions of 84 subjects after physical exercises and in a state of mental stress when passing the Stroop verbal-color test. A technique for automatic detection of 26 anatomical areas of face and neck regions was developed. The average value and standard deviation of temperatures of all selected areas of the face and neck regions in a state of physical stress are lower than in other states. The lowest temperature in a state of physical stress is observed in the area of the face under the nose and above the lip, which can be explained by the increased respiratory rate that occurs during and after exercise. In general, the low temperature readings compared to other conditions under consideration can be explained by increased sweating, lowering body temperature and narrowing of the lumen of blood vessels observed during exercise. Under mental stress, the average temperature values remain the same as in normal state, however, the standard deviation exceeds the same values during stress when passing the Stroop color test. Such leaps are especially noticeable in areas No. 5 and 6 – the inner corners of the eyes, as well as No. 21 and 22 – the area of the face under the nose, which is explained by the concentration of attention during the test and the frequent change in RR (increase/decrease in RR). Accounting for such changes will help expand the capabilities of new applications for assessing the current state of the subject.

scholarly journals Teachers’ health-corrective activity management in connection with students’ educational work with computers

2017 ◽  
Vol 6 (2) ◽  
pp. 273-278
Author(s):  
Natalia Borisovna Shcherbakova
Keyword(s):  
Personal Computer ◽  
Computer Use ◽  
Mental Stress ◽  
Physical Stress ◽  
Computer User ◽  
Educational Work ◽  
Activity Management ◽  
Personal Computer User ◽  
Management Functions ◽  
Negative Factors

The author of the paper pays attention to the problem of safe computer use by students. Schoolchildrens work with computers has such negative factors as: eye strain, mental stress, physical stress associated with prolonged static muscles tension of a personal computer user. That is why it is so important to train teachers for health-corrective activities with students who work with a computer. In this paper the author proposes to consider the algorithm of teachers health-corrective activity management in connection with students educational work with computers. The author notes the following components of teachers health-corrective activity: subject, object, means, process, result, environment, conditions. The author defines management of teachers health-corrective activity. The paper contains an algorithm of teachers health-supporting activity management; the stages of this activity are defined in accordance with the management functions: designing, organization, regulation, control and accounting.

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