Negative Effects Of Stress Research Articles

The harmful effects of drought stress on the camelina oil content and fatty acid composition can be alleviated by using potassium silicate

AbstractA factorial experiment with three replicates was designed to investigate the effects of potassium silicate (0, 1, 2 and 3 g L−1) on camelina under three irrigation regimes (full irrigation, restricted irrigation from silicle formation and restricted irrigation from the beginning of flowering). Compared with full irrigation, restricted irrigation from the beginning of the flowering and silicle formation stages caused reductions of 5% and 11%, respectively, in the oil content and of 48% and 68%, respectively, in the oil yield (oil content 33% and oil yield 736 kg ha−1). The drought stress regimes increased the saturated fatty acid (SFA) content, whereas the polyunsaturated fatty acid (PUFA) content, the PUFA/SFA (P/S) ratio and the monounsaturated fatty acid/SFA (M/S) ratio decreased. Under water‐limited conditions, 3 g L−1 potassium silicate significantly mitigated the negative effects of drought stress and increased the oil yield and content. Moreover, spraying 2 and 3 g L−1 potassium silicate increased the PUFA, P/S and M/S but decreased the SFA. Erucic acid, which was increased by the restricted irrigation treatments, decreased in response to potassium silicate application. Overall, the application of potassium silicate is a suitable measure for camelina cultivation under water‐limited conditions, as it mitigates the adverse effects of drought.

Effects of cryo-facial mask on running performance in amateur middle-distance runners

The excess heat accumulated during exercise can lead to stress-induced fatigue, possibly impairing athletic performance. Various precooling techniques have been applied to enhance thermal comfort, reduce perception of effort, and improve endurance. In this randomized crossover study, twelve male amateur middle-distance runners (age: 33.69 ± 5.9 years; body mass: 71.9 ± 4.4 kg; height: 178.4 ± 5.6 cm; V˙O2 peak: 63.3 ± 5.6 mL min−1·kg−1) wore a facial cooling mask before a time-to-exhaustion (TTE) test on a treadmill, under cryostimulation or control conditions. The running performance comprised also two constant load trials, one conducted before and another after wearing the mask, both performed at the velocity of the first ventilatory threshold. Under cryostimulation condition, the TTE was 13 % higher than the control condition (p = 0.0049; d = −0.19) with a significant main effect of time for both ratings of perceived exertion (F1, 22 = 50.10; p < 0.0001; η2p = 0.69) and heart rate (F1, 22 = 31.53; p < 0.0001; η2p = 0.59). A significant interaction “condition × time” was found for facial skin temperature (F2, 44 = 36.93; p < 0.0001; η2p = 0.63) and for heart rate during the constant load trial after wearing the mask (F1, 22 = 5.90; p = 0.0238; η2p = 0.21). The localized cryostimulation provided by the mask lowered the skin temperature on the face, potentially mitigating the negative effects of heat stress during running. Incorporating the cryo-facial mask as part of a pre-exercise routine for runners may offer a practical and convenient method to optimize performance and enhance overall training outcomes.

Working with AI: The Effect of Job Stress on Hotel Employees’ Work Engagement

Based on the Conservation of Resources (COR) theory and social support theory, this study focuses on the effects of AI-induced stress on hotel employees’ work engagement and examines the mediating role of psychological capital and the moderating role of perceived organizational support. A sample of five-star hotels in China was selected for the study, data were analyzed, and hypotheses were tested using SPSS 27.0 and Mplus 7.4 software. The results of the study revealed that AI-induced stress had a significant negative effect on work engagement and psychological capital mediated the relationship between AI-induced stress and work engagement. Perceived organizational support moderated the relationship between work stress and psychological capital. Specifically, the higher the perceived organizational support, the lower the negative effect of work stress on psychological capital; conversely, the lower the perceived organizational support, the higher the negative effect of work stress on psychological capital. The greater the negative impact of work stress on psychological capital, the higher the perceived organizational support, and the smaller the negative impact of work stress on psychological capital. The findings of the study not only enrich the research related to AI in the hotel industry but also have certain reference significance for managers in the hotel industry who introduce AI in managing their employees.

The moderating role of paternalistic leadership in the relationship between job satisfaction and job stress among health workers in Gaziantep, Turkey.

Adopting an effective leadership style is of critical importance in increasing healthcare efficiency and therefore determining patient satisfaction. For example, although there are many new and effective leadership types today, the paternalistic leadership approach can still play an effective role in developing countries. The aim of this study is to examine the moderating role of paternalistic leadership in the relationship between job satisfaction and job stress. A total of 466 healthcare workers completed measures of perceived paternalistic leadership, job stress, and job satisfaction. The research was conducted in the center of Gaziantep, one of the largest cities in Turkey. Regression analysis was used to evaluate the moderate variable. Dawson slope were used to visualize the results. A negative relationship was found between job satisfaction and job stress. Additionally, it has been determined that the perception of paternalistic leadership has a moderating role. It has been observed that as the perception of paternalistic leadership increases, the negative relationship between job satisfaction and job stress decreases. It has been concluded that the paternalistic leadership approach can play a critical role in increasing the productivity of healthcare workers and reducing the negative effect of stress on satisfaction. It has been suggested that policies be developed to develop appropriate strategies for creating work environments that will increase employees' perceptions of paternalistic leadership.

Energy in the workplace: job demands, job resources, and employees’ inner resources as pathways to organizational outcomes

In this study, we expanded upon the job demands–resources model to assess the role of employees’ vitality as an inner resource for their work engagement and job commitment. To assess vitality and related job resources, we developed an index of vitality outside of work and adapted measures of manager autonomy support and organizational support. For job demands, we measured work stress and predicted that each of these four variables would contribute independently to work-related outcomes. Then, in a preregistered study, we collected these measures from a sample of 5,280 American workers (primarily ages 18–34, 54% female). Results from multivariate regression analyses largely confirmed our hypotheses, showing that positive work-related outcomes, such as enthusiasm, enjoyment, and job satisfaction, were positively predicted by manager autonomy supports, organizational support, and individuals’ vitality, and negatively predicted by work stress. The reverse pattern was largely observed for the negative outcome of turnover intention. Exploratory analyses also suggested that individual vitality may buffer the negative effects of stress and low manager and organizational support. The results highlight the potential role of employee vitality outside of work and managerial support in bolstering work engagement and reducing turnover intentions, offering a basis for organizational strategies aimed at improving work culture and retaining talent.

Knowledge and attitude of tile industry workers in the field of heat stress management

Introduction: One significant factor affecting employee performance is high ambient temperature or heat. Numerous studies have highlighted the negative effects of heat stress in various work environments. Therefore, enhancing workers' knowledge and attitudes toward heat stress can improve their performance. Materials and Methods: This semi-structured content analysis was conducted among tile industry workers in Yazd city in 2023. Participants engaged in both individual and group interviews. Initially, three unstructured interviews helped identify key points, followed by semi-structured interviews, which served as the primary data collection method. The study's reliability and validity were assessed using Lincoln and Guba. Data collection continued until theoretical saturation was reached, and the findings were organized into main themes and subcategories. Results: The workers' perspectives on the issue were explored from various angles, leading to two main themes: knowledge and attitude, each with different subcategories. The knowledge theme includes individual and management factors, while the attitude theme encompasses individual and environmental factors. Conclusion: The tile industry workers in Yazd City demonstrated varying levels of knowledge about heat stress and held attitudes that reflected the negative impacts of this stressor. Factors such as age and education level influenced their knowledge and attitudes. Workers' understanding and attitudes towards heat stress can be achieved through proper training.

Extracellular signal-regulated protein kinase-2 signaling in the nucleus accumbens facilitates stress-susceptibility and cocaine reinstatement.

BackgroundSecond messenger signaling within the mesolimbic reward circuit plays a key role in the negative effects of stress and the underlying mechanisms that promote drug abuse. Since the nucleus accumbens (NAc) integrates reward valence, we investigated how extracellular signal-regulated protein kinase-2 (ERK2) signaling affects the development of stress-related comorbidities, including negative affect and drug sensitivity. MethodsWe assessed how chronic unpredictable stress (CUS) influenced the phosphorylation of ERK2-signaling proteins within the NAc of male Sprague Dawley rats. Using a herpes-simplex virus, we either upregulated or downregulated NAc ERK2 activation and evaluated behavioral responses to stress-eliciting stimuli (elevated plus maze, open field, forced-swim test) and cocaine-seeking behavior (conditioned place preference, self-administration). We also examined ERK2-mediated modifications in spine morphology of medium spiny neurons (MSNs) within the NAc. ResultsCUS increased the phosphorylation of ERK2-signaling proteins within the NAc. Viral-mediated activation of NAc ERK2 enhanced susceptibility to both depression- and anxiety-related stimuli and increased cocaine-seeking behavior (conditioned place preference and reinstatement). These behavioral changes were associated with an increase in stubby and mushroom spines of NAc MSNs. Conversely, downregulation of ERK2 activation attenuated affect-related behavioral responses in the forced swim test and blunted cocaine’s rewarding effects, without influencing NAc spine morphology. ConclusionsNAc ERK2 contributes to stress-induced behavioral deficits, including anxiety- and depression-like phenotypes, while promoting cocaine-seeking behavior. These findings suggest that ERK2 signaling in the NAc plays a role in the comorbidity of these related syndromes.

Deciphering the mechanisms, signaling, and applications of newly isolated Cladosporium crousii SHF to alleviate the negative effects of Pb stress in tomato plants

Deciphering the mechanisms, signaling, and applications of newly isolated Cladosporium crousii SHF to alleviate the negative effects of Pb stress in tomato plants

Deciphering Acclimation to Sublethal Combined and Sequential Abiotic Stresses in Arabidopsis thaliana.

Plants are frequently exposed to environmental challenges. Responses to sub-lethal abiotic stress combinations are complex and often distinct from responses to individual stresses and remain poorly understood. Investigating traits and molecular factors mediating acclimation to stress combinations is essential for the development of climate change-resilient field crops. Here, we studied the morphological, physiological, and molecular responses of Arabidopsis thaliana to i) co-occurring high temperature and drought and ii) flooding followed by drought, both of which have increased in frequency due to climate change, and the individual component stresses: high temperature, drought and flooding. A set of 15 physiological and morphological traits were assessed during single and combined stresses. By combining these comprehensive trait analyses with transcriptome characterization, we established the generally additive negative effects of simultaneous or sequential stresses on plant morphology and physiology compared to the corresponding individual stresses. Although drought had a mild effect on various growth, morphological and physiological traits in both stress combinations, a unique transcriptome signature emerged upon combination with high temperature simultaneously or flooding sequentially. Molecular processes identified as important for multi-stress resilience included plastid-nucleus communication, ABA signaling and photo-acclimation. Based on the RNA-seq data, a set of 39 genes was identified as potential multi-stress response regulators. Mutants were tested to validate the contribution of these genes to plant survival and phenotypic acclimation under combined stress. We confirmed the involvement of several genes in regulating phenotypic acclimation traits. Among the identified factors were EARLY FLOWERING 6 (ELF6) and ARABIDOPSIS TÓXICOS EN LEVADURA 80 (ATL80), with substantial effects on plant growth, leaf development and plant survival (wilting) during high-temperature drought and post-submergence drought, respectively.

Plant growth regulators improve the yield of white lupin (Lupinus albus) by enhancing the plant morpho-physiological functions and photosynthesis under salt stress

BackgroundWhite lupin (Lupinus albus L.) is a multi-purpose, climate resilient, pulse crop with exceptionally high protein content that makes it a suitable alternative of soybean in livestock feed. Although white lupin grows well on marginal sandy soils, previous studies have reported its sensitivity towards salinity stress. This experiment aims to assess the influence of salinity stress and mitigating role of plant growth regulators (PGRs) on performance of white lupin.MethodologyThe white lupin plants were sown in pots maintained at three salinity levels (1, 3 and 4.5 dS m− 1) throughout the growing season and foliar sprayed with different PGRs, including ascorbic acid, potassium chloride, boric acid, ammonium molybdate and methionine at sowing, four weeks after emergence and at the initiation of flowering. Foliar spray of distilled water and salinity level of 1 dS m− 1 were maintained as control treatments. Data were recorded for seed germination indices, plant growth, antioxidant enzymes and photosynthetic efficiency variables.ResultsThe severe salinity stress (4.5 dS m− 1) reduced the germination indices by 9–50%, plant growth traits by 26–54%, root nodulation by 12–26%, grain development by 44–53%, antioxidant enzymes activity by 13–153% and photosynthetic attributes by 1–8% compared to control (1 dS m− 1). Different PGRs improved several morpho-physiological attributes in a varied manner. The application of potassium chloride improved seed vigour index by 53%, while ascorbic acid improved root nodulation by 12% and number of pods per cluster by 75% at the severe salinity level. The foliar application of PGRs also displayed a recovery of 140% in the activity of superoxide dismutase and 70% in catalase. The application of multi zinc displayed an improvement of 37% in plant relative chlorophyll, while ascorbic acid brought an increase of 25% in non-photochemical quenching and 21% in photochemical quenching coefficient at the severe salinity level. On contrary, the application of PGRs brought a relatively modest improvement (8–13%) in quantum yield of photosystem II at slight to moderate (3 dS m− 1) salinity stress. The correlation analysis confirmed a partial contribution of leaf area and seed vigour index to overall photosynthetic efficiency of white lupin.ConclusionsClearly, salinity exerted a negative impact on white lupin through a decline in chlorophyll content, activity of antioxidant enzymes and efficiency of photosynthetic apparatus. However, PGRs, especially ascorbic acid and potassium chloride considerably improved white lupin growth and development by mitigating the negative effects of salinity stress.

Sweet corn (Zea mays L.) seed performance enhanced under drought stress by chitosan and minerals coating.

Sweet corn (Zea mays L.) var. Saccharata is a tropical and semitropical annual cereal with low germination, poor vigor, and weak seedling establishment in the soil. In order to enhance the physical properties of sweet corn and examine the effects of seed coating on the morphological, biochemical, and physiological characteristics of sweet corn seedlings under drought stress conditions, we conducted a factorial experiment in greenhouse conditions. Seed coating was carried out using a mixture of vermiculite (V), kaolin (K), and perlite (P) in a ratio of 3:1.5:2. The main factors of the greenhouse experiment comprised three levels of coating treatment (chitosan 0.5% + V10K2.5P5 (gr), NaAlg 1% + V10K2.5P5 (gr), and non-coated seeds as a control) along with drought stress at four levels (0, -0.3, -0.6, and -0.9bar). In greenhouse conditions, the growth indexes of sweet corn seedlings were studied under increasing levels of drought stress. The results showed that as drought stress levels increased, certain growth indicators such as seedling emergence and seedling emergence rate, soluble protein, chlorophyll total content, nitrogen, and phosphorus content decreased. On the other hand, mean emergence, proline, potassium, soluble sugars, malondialdehyde, and hydrogen peroxide were increased. The study found that the highest seedling emergence percentage occurred in the coating treatment of chitosan 0.5% + V10K2.5P5 (gr) at all levels of drought stress. Overall, seed coating with the Chitosan 0.5% + V10K2.5P5 (gr) treatment improved the performance of sweet corn seeds and reduced the negative effects of drought stress by increasing seedling emergence and establishment.

Application of Silicon Iron and Silver Nanoparticles Improve Vegetative Development and Physiological Characteristics of Boysenberry Plants Grown under Salinity Stress In Vitro Cultivation Conditions

Salinity is one of the most important abiotic stress factors that affect plant growth and limit agricultural productivity. In this study, the effects of iron (FeNP), silver (AgNP), and silicon dioxide (SiNP) nanoparticles on the morphological and physiological parameters of in vitro boysenberry plants grown under salinity stress (NaCl) were investigated. According to our study results, higher values were obtained from SiNP application in terms of shoot development parameters; FeNP application was found to be more successful for root development; AgNP application was effective in terms of SPAD, leaf relative water content (LRWC), and relative growth rate (RGR); and FeNP application increased superoxide dismutase (SOD) and catalase (CAT) enzyme activities. Salt stress significantly affected root development, SPAD values, LRWC and RGR, and SOD and CAT enzyme activities. As a result, under salt stress conditions, SiNP, FeNP, and AgNP applications can significantly reduce the negative effects of stress and promote the vegetative development of the plant compared to control conditions.

Exogenous γ-aminobutyric acid (GABA) enhances rye (Secale cereale) seedling resistance to combined freeze-thaw and cadmium stress.

Freeze-thaw is a common stress at high altitudes in northern China. There is a risk of cadmium (Cd) contamination in the region. γ-aminobutyric acid (GABA) is a natural product that regulates plant growth. Rye (Secale cereale ) was used as research material to investigate the physiological effects of exogenous GABA on rye seedlings under the single and combined stresses of freeze-thaw and cadmium. The results showed that the combined stress severely inhibited shoot length, root length, fresh weight, and dry weight, increased malondialdehyde and hydrogen peroxide contents, and significantly decreased superoxide dismutase (SOD) activity. Foliar application of 5mM GABA alleviated the negative effects of stress on seedling growth, increased soluble protein content, and reduced malondialdehyde and hydrogen peroxide contents. Exogenous GABA application also enhanced the activities of SOD and peroxidase (POD). Additionally, the presence of exogenous GABA activated the GABA metabolic process and encouraged the accumulation of phytochelatins, glutathione, and non-protein thiol. These results indicate that exogenous GABA can effectively improve the resistance of rye seedlings to freeze-thaw and Cd by regulating the antioxidant enzyme system and enhancing its own detoxification mechanism, and they provide a basis for future applications of exogenous GABA, which is beneficial for ecological protection.

Silvopastoral systems as a strategy to attenuate the negative effects of heat stress on productivity of beef cows grazing natural grassland

Silvopastoral systems as a strategy to attenuate the negative effects of heat stress on productivity of beef cows grazing natural grassland

Linseed oil supplementation alters milk fatty acid profile, mitigates heat stress, and improves summer milk yield in grazing dairy cows.

Dietary supplementation of fat can be an important source of energy to compensate for the reduction in dry matter intake in dairy cows during heat stress periods. Studies have reported that supplementing dairy cow diets with linseed oil (LO) can increase milk yield and enhance the levels of beneficial fatty acids, such as omega-3 fatty acids, in the milk. The objective of this research was to evaluate the effect of LO supplementation on milk fatty acids profile, milk yield and composition, and physiological parameters of grazing cows. The study was conducted in two seasons, one in spring and one in summer. A 2 × 2 Latin square design was used in each experiment. Twelve Holstein and crossbred Holstein x Jersey cows were involved in each season. Cows were divided into two groups: control (TC) with no supplementation and treatment (TL) supplemented with 400g/day of LO. The results showed that LO supplementation altered the milk fatty acid profile: decreased concentrations of short and medium-chain fatty acids (C10:0 - C17:1) except for C13:0 and increased concentrations of long-chain fatty acids (C18, C18:1 (both trans and cis isomers), C18:2 (specific conjugated linoleic acid - CLA isomers), and C18:3 n3 (omega-3)). Additionally, milk yield increased by 1.5l per day during summer in LO-supplemented cows, while milk fat, protein, and casein content decreased. Milk stability increased by 2.2% in the LO-supplemented group. LO-supplemented cows reduced internal body temperature and heart frequency in the afternoon and increased daily rumination time by 20min. In conclusion, LO supplementation can be an effective strategy to improve the nutritional profile of milk by altering fatty acid composition towards potentially healthier fats, mitigate the negative effects of heat stress on grazing cows during summer, as evidenced by reduced body temperature and heart frequency and increase milk yield.

Choking under pressure in online and live esports competitions

This paper explores the phenomenon of choking under pressure within the context of esports, particularly focusing on the difference between online and live competitive settings and on high-pressure situations during overtime rounds. Employing a quasi-experimental design, the research leverages an extensive dataset covering professional CS:GO matches from 2012 to 2022 (match-level) and from 2015 to 2023 (round-level), including performance metrics such as players' ratings, headshot percentages, and teammate damage. The findings indicate a substantial decrease in the performance of esports players during overtime. This effect, however, is significantly mitigated in online competitions compared to live events. The study also reveals that while individual performance suffers under pressure, the impact on team coordination is less pronounced in online settings, suggesting that the virtual environment might offer a buffer against the negative effects of stress on team dynamics. This study enriches our understanding of performance psychology in digital settings but also opens up new avenues for research on stress, teamwork, and performance in professional and virtual environments.

Stress-induced VIPergic activation mediates microbiota/Th17cell-dependent depressive-like behaviors

Chronic stress often has deleterious effects leading to the development of psychiatric diseases. The gut-brain axis represents a novel avenue for stress research. The negative effects of stress on the gut physiology have been well-described, whereas the pathways whereby stress controls microbial composition to modulate behaviors remains mainly unknown. We discovered that vasoactive intestinal peptide (VIP) activation promoted stress-induced microbial changes leading to increased infiltration of T helper (Th) 17 cells and microglial activation in the hippocampus and depressive-like behaviors, uncovering a close crosstalk between intestinal VIPergic release and the gut microbiota during stress and providing a new interaction between the nervous system and the gut microbiome after stress. Neutralization of the signature cytokine of Th17 cells, interleukin (IL)-17A, was sufficient to block depressive-like behaviors, reduce neuronal VIPergic activation and microglia activation induced by VIPergic activation after stress, opening new potential therapeutic targets for depression

Plant Beneficial Desert Actinomycete, Modestobacter caceresii KNN 45-2bT, Promote Growth of Tomato (Lycopersicum esculentum Mill.) under Drought Condition

Drought stress is currently the most serious challenge to global food security and agricultural productivity. Desert actinobacteria have gained attention as potential candidates for enhancing plant growth in water stress environments. In this regard, a desert actinomycete, namely Modestobacter caceresii strain KNN 45-2bT, was selected to investigate its plant growth promoting abilities and drought tolerance. Next, this desert strain was inoculated to tomato (Lycopersicum esculentum Mill.) under drought, and the results included increases in root length, shoot and root fresh weight, shoot and root dry weight, total fresh weight and dry weight, fruit weight, proline accumulation, total soluble sugar content and trolox content. Stress treatments on the bacterized tomato plants also resulted in the reduction of hydrogen peroxide accumulation. Putative proteins coding sequences conferring plant growth promoting (PGP) traits (IAA production, phosphate solubilization, siderophore production, nitrogen fixation) and drought response (biosynthesis of proline metabolism, oxidative and osmotic stress response) were also detected from their genomic analyses. In conclusion, these results provide credence to the idea that the inoculation of tomato plants with plant beneficial desert actinomycete is an effective method of combating the negative effects of drought stress.

Study of Sleep Quality in Geopathic Stresses Areas and Efficacy of Enviromat in Improving the same- A Quantitative Study

A good night's sleep is essential for maintaining a healthy body and mind, as our body cells repair themselves during sleep. However, various factors can disturb our sleep, and Geopathic Stress is considered one of the contributing reasons. Geopathic Stress refers to the disturbance of natural energy flows, primarily caused by geological features such as underground water veins, mineral deposits, and fault lines, which can lead to disruptions in health. So, we aim to investigate the impact of Geopathic Stress on sleep quality and the efficacy of Enviromat as a potential solution. In this study, a total of 22 subjects were screened and recruited as per the inclusion and exclusion criteria. The research began with a literature review of relevant studies to identify the effects of Geopathic Stress on sleep quality. After reviewing the relevant research studies, a protocol was formed and presented to the Institutional Ethics Committee for approval, at All India Institute of Medical Sciences, New Delhi. Once the protocol was approved, Geopathic Stress zones were identified in the Sleep lab, where subjects slept on the beds in these zones. Subsequently, the Enviromat was evaluated for its efficacy to mitigate the harmful effects of Geopathic Stress on sleep quality. Complete data of 20 subjects was recorded and analysed with and without Enviromat with a gap of 10 days between two readings. The results indicated that sleep quality improved significantly (from 80.78 ± 7.83 to 87.08 ± 5.70; p-value = 0.0021) in most subjects when the Enviromat was used, suggesting its potential effectiveness in counteracting the negative effects of Geopathic Stress on sleep. These findings provide valuable insights into the relationship between Geopathic Stress and sleep and highlight the Enviromat as a promising intervention.

The impact of operational police stress on affective commitment: the mediating role of psychological safety

PurposePolice stress is a critical concern for public safety agencies. This study proposes a research model to examine the relationship between police operational stress and affective commitment, mediated by psychological safety.Design/methodology/approachA survey was developed and administered to law enforcement professionals from two large police agencies in a Midwestern US state and Rio de Janeiro state, Brazil.FindingsThe results suggest the research model applies similarly in both countries. A significant relationship between police operational stress and lower affective commitment was found. Psychological safety mediated this effect, suggesting its importance in mitigating stress. The focus on psychological safety offers valuable insights for understanding officer well-being in high-stress environments.Research limitations/implicationsQualitative methods might be used to help better understand the contextual elements around police stress and its consequences. Results indicate that supportive work environments that foster psychological safety can be a powerful tool to buffer the negative effects of stress and promote officer well-being and retention.Practical implicationsA comprehensive understanding of the psychological factors influencing officer morale and engagement is essential for developing interventions to enhance law enforcement effectiveness. Psychological safety helps create a supportive work environment, reducing stress’s negative impact on officer commitment.Originality/valueThis study makes a distinctive contribution by examining the mediating role of psychological safety in the relationship between operational stress and affective commitment among police officers in two countries. Building upon prior research that has examined the impact of stress and psychological safety, this study is among the first to investigate how psychological safety specifically mitigates the negative impact of stress on officer commitment.