Ergonomic hazard

Ergonomic hazards are physical conditions that may pose a risk of injury to the musculoskeletal system due to poor ergonomics. These hazards include awkward or static postures, high forces, repetitive motion, or short intervals between activities. The risk of injury is often magnified when multiple factors are present. Environmental, operational, or design factors can all negatively impact a worker or user; examples include whole-body or hand/arm vibration, poor lighting, or poorly designed tools, equipment, or workstations. Some of the common body regions where injuries may occur include: Muscles or ligaments of the lower back Muscles or ligaments of the neck Muscles, tendons, or nerves of the hands/wrists Bones and muscles surrounding the knees and legs Injuries in these and other parts of the body could result in musculoskeletal disorders (MSDs), which may be called cumulative trauma disorders (CTDs) or repetitive strain injuries (RSIs), and are estimated to account for about a third of all non-fatal injuries and illnesses and their associated costs. Ergonomic hazards occur in both occupational and non-occupational settings such as workshops, building sites, offices, homes, schools, or public spaces and facilities. Finding ways to eliminate or reduce ergonomic hazards in any setting will ultimately reduce the risk of injury. Awkward posture is when the body deviates significantly from a natural position during work-related activities. Awkward posture reduces work efficiency due to unnecessary overexertion. When awkward posture is sustained for a long period of time, muscles and nerves may become pinched. Examples include twisting, reaching, pulling, lifting, bending, or any other posture that can cause pain when sustained for a prolonged period. Static posture, or static loading, is when a person holds a consistent posture during the entirety of the time it takes to perform a task, which does not allow the body to relax. It is a problem because it can lead to muscle pain, fatigue, and joint issues, and increases the risk for musculoskeletal injuries.

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Handwriting practising, as any other repetitive task, often leads the practiser to an overconcentration state where their performance might be affected by postural and mental fatigue. Short breaks to perform unrelated activities, especially relaxation exer ...

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Hypogravity modeling of upper extremities: an investigation of manual handling in the workplace

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Experiments on the lower limbs are the only approaches being used to study how hypogravity (HG) (0 < g < 1, e.g., Moon: 1/6 g, Mars: 3/8 g) affects human movement. The goal of this study was to expand this field experimentally by investigating the effect o ...

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An Empirical and Subjective Model of Upper Extremity Fatigue Under Hypogravity

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In the context of extra-terrestrial missions, the effects of hypogravity (0 < G < 1) on the human body can reduce the well-being of the crew, cause musculoskeletal problems and affect their ability to perform tasks, especially during long-term missions. To ...

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Ergonomie

L’ergonomie est « l'étude scientifique de la relation entre l'humain et ses moyens, méthodes et milieux de travail » et l'application de ces connaissances à la conception de systèmes « qui puissent être utilisés avec le maximum de confort, de sécurité et d'efficacité par le plus grand nombre ». Le terme « ergonomie » vient du grec ancien / érgon (« travail ») et / nόmos (« loi »).

Repetitive strain injury

A repetitive strain injury (RSI) is an injury to part of the musculoskeletal or nervous system caused by repetitive use, vibrations, compression or long periods in a fixed position. Other common names include repetitive stress injury, repetitive stress disorders, cumulative trauma disorders (CTDs), and overuse syndrome. Some examples of symptoms experienced by patients with RSI are aching, pulsing pain, tingling and extremity weakness, initially presenting with intermittent discomfort and then with a higher degree of frequency.

Trouble musculosquelettique

vignette|307x307px Le terme générique de « trouble musculosquelettique » (TMS), ou de « lésion attribuable au travail répétitif » (LATR), au Québec, regroupe de nombreuses pathologies des tissus mous (muscles, tendons, nerfs). C'est la maladie professionnelle la plus courante dans les pays développés en 2012. L'expression est plus couramment utilisée au pluriel. En France, la plupart des TMS sont reconnus dans le tableau 57 des maladies professionnelles du régime général de la sécurité sociale et dans le tableau 39 du régime agricole.

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