Ergonomics for Gardeners - Series 7 Article 1 - Introduction
By Marilyn Fishman
This
series of articles will review what ‘ergonomics’ (also know as ‘human factors’)
is and how it applies to gardening. I
became interested in ergonomics when a co-worker’s chronic arm, neck, and
shoulder pain was relieved by having her desktop lower: it had been four inches too high. The
proliferation of personal computers, tablets, and smartphones have put
ergonomic concerns into the hands of the general public (pun intended). Repetitive Stress Injuries are no longer
limited to assembly line works, cashiers, and musicians. Gardening is hard work; learning some of principles of worker safety
could help save a gardener from pain and discomfort.
The
Center for Disease Control National Institute for Occupational Safety and
Health
defines ergonomics as “the scientific study of people at work”. The CDC states
that “the goal of ergonomics is to reduce stress and eliminate injuries and
disorders associated with the overuse of muscles, bad posture, and repeated
tasks. This is accomplished by designing tasks, work spaces, controls, displays, tools,lighting, and equipment to fit the employee´s physical capabilities and limitations.”
The
term “ergonomics” was coined (in 1857) from two Greek words: ergon, meaning work, and nomoi, meaning
natural laws. With the Industrial
Revolution (1750-1914), machinery and
factories were designed for speed and efficiency of production, with no
consideration of worker safety. In the late 19th and early 20th
centuries “Scientific Management” (Frederick Winslow Taylor) and “Time and
Motion” studies (Frank and Lillian Gilbert) aimed to identify the most
efficient, not always the safest, method for carrying out a given task.
However,
during the Second World War, the human factor in man-machine interfaces became
critical. Displays and controls in war
machines needed to be clear and simple to use during the stress of battle.
After World War II, the field of “Human
Factors” research was formalized and
research expanded to include issues of industrial worker safety as well as productivity.
Some
key principles of ergonomics and body mechanics are:
1. Maintaining a neutral posture:
keeping proper body alignment while working
2. Working in the “comfort zone” as close to the body
as possible
3. Managing risk to the
musculoskeletal system of bones, muscles, tendons, ligaments and joints
4. Reducing excessive force,
motions, and contact stress
5. Allowing for movement and
stretching
6. Avoiding repetitive motions
7. Maintaining a comfortable work
environment
Part
2, coming next week, will demonstrate the application of ergonomics to
gardening.