Another day at Rick’s life. Schoolbooks, basketball stuff and a lot of weight in his backpack!
The workload and ergonomics can cause injuries in the human body that may result from a single exposure to an intense effort or from repetition and prolonged exposure to lesser efforts and bad postures, as sitting in an inappropriate desk all day. These injuries may result in musculoskeletal disorders (MSDs) and can affect workers in all sectors.
There are not exact preventive measures to reduce or mitigate such hazards. Different authors suggest job rotation as a solution (reducing the exposition time), but that does not directly imply a reduction of musculoskeletal complains in a workplace, given that in order to reduce the exposure of one worker, that of another worker will increase. To implement an effective job rotation schedule, it is necessary to assess the workload of all workers and rotate the task between those with similar work demands
To workers in desk jobs and who remain sitting during work hours is important to have a neutral posture. To such achievement:
It is not only heavy weights and intense efforts that cause injuries. Adopting a correct posture is crucial even when you bend over and lift lightweight objects!.
- Before lifting -
- While lifting -
There is a maximum heights value for the loads according to gender and load position considering that the lifting is being well executed and for a maximum of 30 operations per hour:
1. shoulder height
2. elbow height
3. knuckle height
4. mid lower height
If instead of lifting, the purpose is to push or pull the load, the maximum loads should not surpass the following values:
|Force to stop or start the load||20Kg||15Kg|
|Sustained force to keep the load in motion||10Kg||7Kg|
Regarding back belts/supports, they should not be considered as personal protective equipment, since it is considered that they do not prevent any type of back injuries, and can even cause the opposite effect, since workers tend to lift heavier loads, believing that the back belt makes them be stronger.
did you know that...
Musculoskeletal disorders are one of the most common occupational diseases in the European Union affecting millions of workers.