Ergonomics definition--Ergonomics is an applied science that deals with designing and arranging things in a manner where it is easier and safer for people to use.
Ergonomics comes from two Greek words (ergon and nomos) meaning laws. In the work environment, ergonomics refers to designing a job for a worker rather than forcing the worker to fit the job. Ergonomics covers physical stresses and environmental stresses on a worker. Physical stresses are negative things in the workplace that impact the muscles, joints, bones, tendons and nerves. Environmental stressors refer to things that could negatively impact comfort, health, vision and hearing.
Physical stressors: Regarding physical stressors, there are two main kinds. The first is repetitive motion stresses. With this kinds of stress, if someone were to undertake the motion once or now and then, no injury would normally result, like typing or sticking a phone between your ear and jacking up your shoulder to hold it. But done day after day, hour after hour, these motions could lead to carpal tunnel syndrome, tendonitis and other maladies. The other kind of physical stresses are jobs that involve great force and vibration, such as using a jack hammer.
Environmental stressors: Environmental stresses include such things as dust in the air, loud noises where you are working, improper lighting and other factors.