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Industrial hygiene is a branch of public health research that aims to prevent illness and promote Industrial hygiene is an aspect of public health that prioritizes health protection measures for workers through the identification, evaluation, and control of various elements of the work environment that can cause health problems. The goal of implementing industrial hygiene is to prevent work-related illnesses and create a safe, healthy work environment that supports workers’ well-being. Industrial Safety and Health (IS&H) encompasses these various components, including risk identification, risk assessment, risk mitigation, and worker health monitoring, waste management, and emergency response planning. Workplace risks can include physical, chemical, biological, psychological, and ergonomic hazards. Hazard analysis is a crucial step in industrial hygiene as it helps identify and document potential health risks in the workplace. The hazard analysis process includes hazard identification, risk assessment, hazard prioritization, and risk control. The implementation of Occupational Safety and Health aims to ensure the protection of employees’ safety and health from potential hazards arising from work, while ensuring a safe and sustainable work environment. The implementation of OSH and environmental health also provides broad strategic benefits such as worker protection, cost efficiency, increased productivity, regulatory compliance, and enhanced corporate reputation.  

Introduction: Smartphone use has increased substantially in higher education and is widely used by university students for both academic and non-academic activities. Prolonged smartphone use combined with poor posture may increase mechanical load on cervical structures and lead to neck pain. This study aimed to examine the relationship between smartphone use and neck pain intensity among students at IKES Suaka Insan. Methods: A quantitative cross-sectional study was conducted involving 55 undergraduate nursing and physiotherapy students selected using cluster sampling. Smartphone use was assessed using a structured questionnaire, while neck pain intensity was measured using the Visual Analog Scale (VAS). Data were analyzed using Spearman’s rho correlation test. Results: The analysis showed a weak negative association between smartphone use and neck pain intensity (r = -0.16), with a p-value of 0.20 (>0.05), indicating no statistically significant relationship. Conclusion: There was no significant association between smartphone use and neck pain intensity among students. Future studies should include ergonomic posture and duration of smartphone use as additional variables.

Introduction: Smartphone use has increased substantially in higher education and is widely used by university students for both academic and non-academic activities. Prolonged smartphone use combined with poor posture may increase mechanical load on cervical structures and lead to neck pain. This study aimed to examine the relationship between smartphone use and neck pain intensity among students at IKES Suaka Insan. Methods: A quantitative cross-sectional study was conducted involving 55 undergraduate nursing and physiotherapy students selected using cluster sampling. Smartphone use was assessed using a structured questionnaire, while neck pain intensity was measured using the Visual Analog Scale (VAS). Data were analyzed using Spearman’s rho correlation test. Results: The analysis showed a weak negative association between smartphone use and neck pain intensity (r = -0.16), with a p-value of 0.20 (>0.05), indicating no statistically significant relationship. Conclusion: There was no significant association between smartphone use and neck pain intensity among students. Future studies should include ergonomic posture and duration of smartphone use as additional variables.

The physiological changes that occur during pregnancy, both physically and mentally, may be rather uncomfortable, particularly in the second and third trimesters. Pregnant women often report back discomfort, muscular aches, trouble sleeping, excessive exhaustion, and irregular sleep patterns. Mothers' physical and mental health as well as the health of their unborn children may be significantly impacted by inadequate sleep quality during pregnancy. To enhance comfort and the quality of sleep during pregnancy, one non-pharmacological technique is to use an aromatherapy maternity pillow. An ergonomic and ecologically sustainable invention to enhance mother comfort during pregnancy was the goal of this research, which intended to produce a Pregnancy Pillow Therapy product with pineapple leaf fiber and aromatherapy. A descriptive research design using a prototype creation technique was used in this study. The stages of the research included problem identification, literature review, product design, material selection, prototype manufacturing, and product evaluation. Data were collected through literature studies and observations related to sleep discomfort in pregnancy, maternity pillow utilization, aromatherapy therapy, and pineapple leaf fiber characteristics. The developed product was designed ergonomically to support the back, abdomen, waist, and legs of pregnant women. The addition of aromatherapy was intended to provide a relaxing effect and improve sleep quality. The use of pineapple leaf fiber also supports environmentally friendly product innovation through agricultural waste utilization. The results indicate that Pregnancy Pillow Therapy has the potential to become a supportive product for improving comfort and sleep quality among pregnant women. Further studies are recommended to evaluate product effectiveness directly among pregnant women.

Industrial hygiene management plays a critical role in protecting worker health by controlling exposure to hazardous factors in the workplace. However, many work environments still show suboptimal implementation, leading to increased risks of occupational diseases. This study aims to analyze the implementation of industrial hygiene management systems in improving worker health based on a literature review approach. The method used is a literature review by collecting and analyzing scientific articles from national databases published between 2021 and 2026. A total of ten relevant articles were selected through a systematic screening process based on predefined inclusion criteria. The findings indicate that workplace hazards such as physical, chemical, and ergonomic factors are significantly associated with various health problems, including respiratory disorders, musculoskeletal issues, and work-related fatigue. The implementation of industrial hygiene management systems, including hazard identification, risk control measures, use of personal protective equipment, and environmental monitoring, has been shown to reduce health risks among workers. However, the effectiveness of implementation is influenced by factors such as worker compliance, management commitment, and availability of facilities. These results highlight the importance of a comprehensive and systematic approach to industrial hygiene in maintaining worker health and preventing occupational diseases. Therefore, strengthening the implementation of industrial hygiene management systems is essential to create a safe and healthy working environment and to support sustainable occupational health practices.

Furniture is an item needed to complete the needs at home or residence, furniture helps the process of household chores become easier, as a place of storage, and creates comfort for its occupants. In this increasingly environmentally conscious era, product design is here to integrate the principles of sustainability. One of them is waste from industrial HPL (high pressure laminate) which is often thrown away without being utilized, Plywood waste and High Pressure Laminate (HPL) are by-products of the furniture industry that hold potential for reuse through sustainable design practices. This study aims to design a coffee table using plywood and HPL waste by applying the Design Thinking method, which includes the stages of empathize, define, ideate, prototype, and test. This method enables user needs analysis, idea exploration, and iterative prototype development. The results indicate that waste materials can be transformed into a coffee table that is strong, aesthetically appealing, and functional. The use of HPL enhances surface durability and visual value, while the plywood structure can be reinforced through simple joinery systems. The final product meets ergonomic, stability, and aesthetic criteria. In conclusion, Design Thinking is effective in transforming waste materials into high-value furniture and supports sustainable design practices

The hospital laundry installation is a non-medical supporting unit with a high risk of occupational health and safety (OHS) hazards due to direct exposure to chemicals, machinery, and contaminated linen. Potential hazards in this unit include physical (heat, noise), chemical (detergents and disinfectants), biological (viruses and bacteria from linen), and ergonomic (improper working posture) risks. This study is a descriptive quantitative research with a semi-quantitative approach. The aim is to identify, assess, evaluate, and control OHS risks in the laundry unit. Data were collected through observation, interviews, and document review with seven laundry staff members. Risk assessment was conducted using a risk matrix based on the AS/NZS 4360:2004 standard. The results show that several risks ranged from low to very high levels, including infection from linen, chemical exposure, noise, and injury from machinery. Risk control measures implemented include applying the hierarchy of controls, starting from elimination, substitution, engineering controls, Administratif controls, and the use of personal protective equipment (PPE). It is concluded that improvements in supervision, staff training, and facility upgrades are necessary to minimize occupational accidents in the laundry installation.

The Sunter C Polder/Pump construction project is a strategic effort to address flooding issues by increasing drainage system capacity. This project involves various high-risk construction activities that have the potential to cause workplace accidents and health issues. This study aims to identify hazards, assess risk levels, and determine control measures. The HIRADC (Hazard Identification, Risk Assessment, and Determining Control) method involves a systematic identification of potential hazards at the project site, risk assessment based on impact and probability, and the formulation of appropriate control recommendations. This is a descriptive study designed to illustrate Occupational Health and Safety (OHS) hazards and risks, located at the Sunter C polder/pump construction project. The research was conducted from January to May 2025. Data were collected through interviews, observations, and information obtained directly from internal company documents. The results indicate that the application of the HIRADC method accurately identifies various primary hazards, such as the risk of falls, being struck by materials, chemical exposure, and ergonomic issues. The risk assessment suggests that most activities fall under the medium to high-risk categories, necessitating controls such as the use of Personal Protective Equipment (PPE), OHS training, and routine monitoring of working conditions. The implementation of the HIRADC method in this project is proven to enhance the culture of occupational health and safety and can serve as a reference for other construction projects in managing operational risks effectively.

Occupational Safety and Health (K3) is an important aspect in protecting workers from potential accidents and health problems arising from work activities, including in the administrative sector, which is often considered low-risk. However, the Human Resources (HR) Department at PT Micro Madani Institute (MMI) Solo Branch still found several potential hazards and work risks that have not been optimally identified. This study aims to apply the Hazard and Operability Study (HAZOPS) and Job Safety Analysis (JSA) methods to identify and mitigate hazards and work accident risks in the HR Department's activities at PT Micro Madani Institute (MMI) Solo Branch. The research method is a qualitative study with a descriptive approach through observation and interviews. Risk analysis used the JSA and HAZOPS methods. The results of the study show that the application of the HAZOPS method in five sections of the HR Department successfully identified 53 potential hazards and risks, consisting of 12 extreme risks, 23 high risks, 15 moderate risks, and 3 low risks with the Employee Training and Development section as the section with the largest number of risks. Meanwhile, the application of the JSA method also identified 53 potential hazards and risks from 19 work activities. The dominant risks stem from non-ergonomic work postures, prolonged sitting, intensive computer use, and high workloads. This study concludes that the JSA and HAZOPS methods are effective in identifying potential occupational hazards and risks and can serve as the basis for control efforts to minimize workplace accidents and improve OHS implementation in the HR Department.

Low productivity and high sick leave in the weaving division of PT XYZ in Yogyakarta are caused by excessive physical and mental workload on Shuttle Loom Unit 2 operators. The productivity of the weaving division of PT XYZ was recorded at only 61.96% (target 75%) with sick leave of 4.17%, indicating operator fatigue. This study measured physical workload using the Cardiovascular Load (CVL) method based on heart rate and mental workload using NASA-TLX, and analyzed the correlation with age and length of service. The results showed a moderate physical workload category (40% light CVL <30, 60% moderate 30-60) at a temperature of 30.5°C, and high-very high mental workload (45% high 50-79, 55% very high ≥80, average EF 79.3) due to strict quality targets (0.5% defects). There is a correlation between CVL and NASA-TLX with age. Recommendations include reducing the daily production target from 100 to 85-88 yards, optimizing ergonomics, and training to reduce EF to 65 and defects to 0.3, to increase effective productivity.

MMP is a metal manufacturing company engaged in casting, forging, and machining processes with a three-shift work system, including night shifts that may increase mental and physical workload due to disruptions in workers’ biological rhythms. This study aims to analyze the mental and physical workload of die casting machine operators during the night shift and to propose improvement measures using the Fault Tree Analysis (FTA) method. The study involved 23 operators, with mental workload assessed using NASA-TLX and physical workload measured using CVL. The results indicate that mental workload falls into high to very high categories, with WWL values ranging from 46.6 to 97.3, where 12 operators experienced very high mental workload. The dominant contributing dimensions were effort, physical demand, and temporal demand. Meanwhile, physical workload ranged from 19.48% to 36.36% CVL, with most operators not experiencing fatigue. Although physical workload remains within acceptable limits, the high mental workload indicates the need for improvements. FTA analysis identified key contributing factors, including work methods, work systems, ergonomics, machine conditions, and the work environment. Proposed improvements include job rotation, improvements in work methods and task distribution, adjustments to the work system, enhanced machine maintenance, and ergonomics-based workplace improvements.

The problem lies in the load lock from the wheel arm, the BLDC motor whose distance cannot be adjusted, and the flywheel whose movement is less smooth than the original design. The purpose of refining the design is to obtain smooth movement and the position of the load lock from the wheel arm, the BLDC motor that can be adjusted to be ergonomic and optimal. The method of refining the design and manufacture of the rear shock breaker spring type electric bicycle through the stages of working load analysis, the need for the distance of the load setting position and the BLDC motor, calculating the construction strength, manufacturing components, assembling components, and evaluating the results of the shock breaker manufacture. The results of refining the design and manufacture of the rear shock breaker spring type electric bicycle show that the movement of the load lock position from the wheel arm and the BLDC motor is smooth, the flywheel must be balanced, the dimensions of the shock breaker device are 120 cm long, 49.5 cm wide, 155 cm high, 120 rpm rotation speed, 2 cm shock breaker movement distance, and 1.5 cm sideways movement deviation which implies being able to provide adequate damping for electric bicycle riders well.

Lifting activities are an essential part of manual material handling across various industrial sectors and constitute a primary source of ergonomic risk exposure when performed with inappropriate work postures. The use of hands-off tools such as push-pull sticks is often implemented to maintain a safe distance between workers and loads and to reduce exposure to line-of-fire hazards. However, the implementation of work aids does not automatically ensure neutral work postures, as push-pull techniques, reach distances, and environmental conditions can still lead to awkward postures. This study aims to evaluate the work posture risk in lifting activities using a fiber-composite push-pull stick based on the Rapid Entire Body Assessment (REBA) method. The research was conducted as an observational analytic field study involving nine workers in tubular pushing and pulling activities. Work postures were documented through direct observation and visual recordings, then assessed using REBA to obtain risk scores, risk categories, and required corrective actions. The results indicate that work postures fall into the medium to high-risk categories, with trunk and shoulder components being the dominant contributors. These findings confirm the need for improvements in work methods, ergonomic training, and strengthening of lifting SOPs to optimize the safety and ergonomic benefits of work aids.

Low back pain (LBP) is one of the most common musculoskeletal complaints globally and is the main cause of decreased work productivity. One of the risk factors that has been widely studied in the literature is prolonged sitting duration. Prolonged sitting activities cause increased static pressure on the lumbar spine, fatigue of the supporting muscles, as well as a decrease in local blood flow that can trigger chronic pain. This study is a literature review with a meta-analytical approach that aims to analyze the relationship between long-term sitting and the incidence of LBP. The review process was carried out following PRISMA guidelines through searches on PubMed, Scopus, ScienceDirect, and Google Scholar databases for publication in 2020–2025. Of the 20 previous studies analyzed, most showed a positive association between sitting time and an increased risk of LBP, both in adults, adolescents, and children. Sitting for more than 6 hours per day increases the risk of LBP by 33%, especially in individuals with low physical activity. In addition, longer sitting durations with poor posture and minimal active rest were found in the group of office workers and professional drivers who had a high prevalence of LBP. Physical activity has been shown to play a protective role against the risk of LBP, while ergonomic interventions such as lumbar support can reduce pain complaints. Although most studies were observational, the consistency of results supports the importance of prevention through reduced sitting time, increased physical activity, and ergonomic work environment settings. These findings provide a scientific basis for multidimensional interventions to effectively reduce the incidence of LBP.  

The increasing use of digital devices among adolescents raises concerns regarding eye health, particularly myopia. Non-ergonomic postures, such as using gadgets in a lying position, may increase accommodative stress on the eyes and contribute to visual impairment. To analyze the association between the duration and viewing distance of gadget use in a lying position and the occurrence of myopia among eighth-grade students at SMPN 119 Central Jakarta. An observational analytic study with a cross-sectional design was conducted involving 74 eighth-grade students. Data on gadget use habits, including duration and viewing distance, were collected using a structured questionnaire. Visual acuity was assessed using a Snellen chart. Bivariate analysis was performed using the Chi-square test with a significance level of p < 0.05. Decreased visual acuity was found in 62.2% of respondents. There was no significant association between viewing distance and myopia (p = 0.080). However, a significant association was identified between gadget use duration exceeding two hours per day and the occurrence of myopia (p = 0.002). The duration of gadget use in a lying position was significantly associated with myopia, whereas viewing distance was not. Limiting the duration of gadget use may help prevent visual impairment among adolescents.

Musculoskeletal Disorders (MSDs) complaints in muscles, joints, and soft tissues can be caused by poor posture, repetitive movements, and excessive physical load. In the wet cake-making industry, workers often sit or stand for long periods, bend, and perform monotonous hand movements, which increases the risk of MSDs. The impact includes decreased work comfort, productivity, and quality of life. This study aims to assess the ergonomic risk level in wet cake-making workers and identify the relationship between work activities and MSD complaints. The method used is descriptive quantitative research with a cross-sectional design, involving 45 workers at Kue X Silaberanti. Ergonomic risk was assessed using the REBA method, while MSD complaints were measured using the Nordic Body Map questionnaire. The results show that in the mixing process, 58.8% of workers experienced a very high risk of MSDs. In the molding and baking processes, 52.9% and 68.8% of workers, respectively, were at high risk. The most frequent complaints were pain in the back, neck, shoulders, arms, and wrists due to poor posture and repetitive movements. To reduce the risk of MSDs, workers need to improve their posture, use ergonomic aids, rotate tasks, and undergo training in safe working techniques.

This research examines the implementation of green building principles in the design of the Multipurpose Building at SMP–SMA Islam Hidayatullah Semarang, focusing on energy-efficient strategies and spatial comfort based on the GREENSHIP GBCI certification criteria. The study employs a qualitative descriptive method through interviews with the architect, analysis of architectural drawings, interpretation of interior design visualizations produced by Falana Studio, and literature review on sustainable building design. The findings indicate that the building consistently applies passive design strategies, including the optimization of natural lighting through large openings and a central void, the application of cross-ventilation on each floor, and the integration of façade vegetation that reduces surface temperature and improves microclimate performance. Material selection such as GRC panels, HPL, and modular plywood supports long-term durability, while the interior design demonstrates strong visual comfort and ergonomic quality through indirect lighting, neutral color schemes, and activity-based furniture layout. According to the GREENSHIP assessment categories, the building fulfills Energy Efficiency and Conservation (EEC), Indoor Health and Comfort (IHC), Material Resources and Cycle (MRC), and Appropriate Site Development (ASD) criteria. In conclusion, the Multipurpose Building successfully integrates green building principles as an effective approach to energy efficiency and the enhancement of the educational environment.

Ironing activities in the laundry service industry are performed repeatedly and for long periods, creating a high potential for non-ergonomic work postures. At Laundry Cio’ta, ironing is carried out every day from 08:00 to 21:00 by two workers, which increases the risk of fatigue and musculoskeletal disorders due to continuous and repetitive movements. This study aims to analyze workers’ ironing postures using the REBA method to determine the level of ergonomic risk. Data were collected through direct observation and measurement of body posture angles during the ironing process. The assessment results showed a Score A of 4 and a Score B of 2, producing an initial REBA score of 4. With the addition of an activity score of +1, considering the repetitive nature of the task, the final REBA score increased to 5. This score indicates a moderate level of risk, suggesting that corrective actions are necessary to prevent long-term strain or injury. Based on these findings, ergonomic improvements such as adjusting the ironing table height, modifying the work layout, and encouraging workers to adopt better posture are recommended. Implementing short rest breaks and task variation can also help reduce physical strain and improve worker comfort and productivity.

The rapid development of the digital era has led to a major shift in the modern workplace, with over 1.5 billion people spending more than six hours daily in front of computer screens. This working condition poses significant occupational health risks, including Musculoskeletal Disorders (MSDs) such as Low Back Pain (LBP) and neck strain, with a global prevalence of 60-80%. Furthermore, prolonged screen exposure and high workload contribute to mental health issues like chronic stress and digital fatigue. This community service aimed to increase awareness among PT. XYZ employees regarding the importance of integrated ergonomics to achieve optimal productivity. The method used was an informative sharing session through a presentation and discussion. The material emphasized a three-pronged intervention approach: physical ergonomics (workstation adjustment), technology-based interventions (wearable devices, break reminder apps, and electromagnetic radiation prevention), and mental well-being integration (mindfulness and relaxation techniques). The results showed a significant increase in participant understanding of the health risks and the practical steps to implement integrated ergonomic solutions. It was found that combining technology-based reminders and mindfulness exercises can reduce health complaints by up to 40% better than physical interventions alone. The implication of this service is the recommendation for PT. XYZ to adopt an integrated ergonomic policy that addresses physical, technological, and mental aspects to create a healthier, safer, and more productive work environment for its employees.

The production process of wooden batik at Sanggar Peni Krebet plays an important role in preserving local culture and supporting the economy, but workers face the risk of musculoskeletal disorders due to unergonomic working positions when performing activities such as sculpting, sanding, batik making, and boiling . Based on the NBM questionnaire on 15 workers, the highest complaints were found in the right upper arm (100%), right wrist (100%), and waist (88%). Research using the RULA and REBA methods revealed the batik activity to have a very high risk (RULA 7, REBA 11), requiring immediate improvement, while boiling had a medium to high risk (RULA 5, REBA 9), requiring investigation and change. The EFD emphasizes the importance of designing batik boiling stoves, chairs and tables that consider height according to the worker's body size, ergonomic working positions, and comfortable strainer handles. Tool development should focus on improving comfort, safety and efficiency, with design adjustments to support workers' postures and use lightweight yet strong materials. The application of these elements is expected to improve safety and productivity in the batik industry.