The effects of armrests and high seat heights on lower-limb joint load and muscular activity during sitting and rising

Article Abstract:

A study of the load exerted on the hip, knee and ankle joints as well as the levels of electromyography (EMG) in leg muscles, was carried out on nine healthy men to determine the best type of seating for work which involves sitting and rising frequently. One high stand stool, two ordinary height stools, one of which had armrests, and one low stand stool were compared. Muscular load and activity was found to be least on the high stand stool, thus making it most suitable for jobs requiring frequent sitting and rising.

Health aspects, Evaluation, Biomechanics, Stools, Stools (Furniture), Seating (Furniture)

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The effects of a pneumatic stool and a one-legged stool on lower limb joint load and muscular activity during sitting and rising

Article Abstract:

Experiments were conducted in Sweden on nine male subjects who were asked to rise from four different types of stools: a regular stool, a low stool, a one-legged stool, and a pneumatic stool. Measurements of movements in the knee, hip, and ankle joints were used to study effects of the sitting and rising motion on lower limb activity. Results concluded that a pneumatic stool is beneficial to those who are often called upon to rise from a low sitting position in the course of their work.

Sitting position

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Effects of arm support on shoulder and arm muscle activity during sedentary work

Article Abstract:

A study was conducted to test the effectiveness of arm supports in lessening muscle activity in the shoulder, neck and elbow regions while engaged in various sedentary work activities. Twelve female subjects performed pipetting, typing, and simulated assembly work (using two different positions) while the electromyograms (EMG) of four muscles were recorded. Results show that arm support use successfully reduces EMG level of shoulder muscles but has no effect on the wrist extensor.

Muscles

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