logo
g Text Version
Beauty & Self
Books & Music
Career
Computers
Education
Family
Food & Wine
Health & Fitness
Hobbies & Crafts
Home & Garden
Money
News & Politics
Relationships
Religion & Spirituality
Sports
Travel & Culture
TV & Movies

dailyclick
Bored? Games!
Nutrition
Postcards
Take a Quiz
Rate My Photo

new
Action Movies
Bible Basics
Houseplants
Romance Movies
Creativity
Family Travel
Southwest USA


dailyclick
All times in EST

Autism Spectrum Disorders: 4:00 PM

Full Schedule
g
g Ergonomics Site

BellaOnline's Ergonomics Editor

g

The Shoulder & Repetitive Strain Injuries

Guest Author - Marji Hajic

Repetitive Strain Injuries (RSIs) from computer use or desk work can cause headaches, eyestrain, and pain through the neck, shoulders, arms and back. �The Shoulder� is part of a series taking a closer look at the mechanism of injury and specific injury prevention techniques for particular pain areas.

Anatomy

The shoulder is a unique joint in the body. It has a great deal of mobility in order to allow us to reach and perform activities away from our body. The cost of this mobility is a lack of stability. Most of the stabilizing forces at the shoulder are muscular and ligamentous rather than bony. These soft tissues that provide the shoulder motion and stability can be at risk for repetitive strain injuries.

The shoulder is composed of three bones: the clavicle (collar bone), the scapula (shoulder blade), and the humerus (long bone of the upper arm). The rotator cuff surrounds the shoulder and provides muscular stability for the humeral head. The shoulder blade controls shoulder motion. Nine of the fifteen muscles that attach to the scapula provide this motion.

RSI

With computer, desk, assembly or other types of hand intensive work, the neck and shoulders round forward and the upper arm tends to rotate inward. The chest muscles become tight. The muscles of the back weaken and stretch. The upper trapezius (the big, bulky muscles that make up the top of the shoulder) try to compensate by working harder than they should. Muscle knots and tension develop. The arms feel tired and weak. Eventually, this muscular imbalance can cause a tendonitis in the rotator cuff (supraspinatus) or in the biceps where it attaches to the humerus. Or the fluid cushion (bursa) between the rotator cuff and the shoulder bones can become inflamed (bursitis).

Poor posture can be the primary factor in developing shoulder pain. Other activities that tend to cause problems are prolonged or repetitive overhead reaching (such as when lifting binders or books down from shelves above the computer) or holding the arms elevated while typing, using the mouse, or performing other hand work. Tichauer (1978, The Biomechanical Basis of Ergonomics) discovered that a chair height that was 3 inches too low for a worker caused excessive shoulder movements and reduced productivity by as much as 50%.

RSI Prevention for Shoulder Pain

  • Neutral and Relaxed Shoulder Positioning
    • Postural awareness is of major importance in injury prevention.
    • The shoulders (upper trapezius muscle) should be relaxed while working.
    • Arms should be positioned at your side with the ears, shoulders and elbows in line.
    • Avoid rounding the shoulders or hunching forward
    • Maintain a neutral neck posture.

  • Ergonomics
    • Chair height should allow you to reach the work surface/keyboard/mouse with the elbows opened slightly greater than 90 degrees and the shoulders relaxed, not elevated.
    • Use of arm supports has been debated in the therapeutic community. The shoulders should be allowed to move freely to position the hands so that excessive movement is not required at the more vulnerable elbows, wrists and fingers. However, unsupported use of the arms is a contributing factor in shoulder pain.
    • If using arm rests, they should be positioned at a height that allows the shoulders to be relaxed. Do not plant the forearms down on the rests while typing. Allow the forearms to glide over the rests unless taking a break from hand activity.
    • Articulating Arm Rests are a good option for providing support with movement.
    • Position your activity and supplies so that repetitive or sustained lifting or reaching is avoided.
    • If you do need to reach frequently overhead, use a step-stool so that the object you are reaching for is closer to you with less shoulder stretch needed.
    • Keep the keyboard and mouse in close to the body
    • Place frequently needed items in a close work envelope between hip and shoulder height.

  • Tension and Stress
    Many people hold tension in their shoulders. When feeling stressed, try to break the cycle by practicing diaphragmatic breathing techniques or taking a quick break away from the demanding situation. Perform some shoulder rolls emphasizing the backwards and downwards movements.
  • Exercise
    • Stretch frequently throughout the day.
    • Take frequent micro-breaks.
    • Try these exercises to recreate muscular balance in the shoulder complex. Remember, these exercises should not cause pain. Start slowly using a light weight. Add additional weight and repetitions gradually.

      • Strengthen the Rotator Cuff with Side-Lying External Rotation
        • Hold a light weight in your right hand. Lying on your left side, hold your right elbow tucked in at your side. Not moving the elbow away from your side, lift your hand towards the ceiling, then smoothly and slowly move your hand towards your stomach. Repeat 8-12 times. Perform 1-2 sets. Repeat with the other arm.

      • Stretch the Pecs with the Doorway Stretch
        • Stand in a doorway facing the doorway jam. Bend your elbow placing one forearm along the doorway jam with the hand at about head height. Slowly rotate your body away from the doorway jam until you feel a nice stretch in your chest muscle close to your shoulder. Hold for 20-30 seconds. Repeat 2-3 times. Repeat with the other arm.

      • Towel Stretches for Internal and External Rotation
        • Drape a towel over your left shoulder holding to the upper end of the towel with your left hand. Place your right arm behind your back and grab on to the end of the towel. With your left hand, pull your right hand up along the spine as if you are trying to scratch an itch as high up your back as possible. Hold for 20 seconds. Repeat 2-3 times. Then with your right hand, pull the towel down, stretching the left hand along the spine as if you are trying to scratch an itch as low on the back as possible. Hold for 20 seconds. Repeat 2-3 times. Repeat with the other arm.

      • Shoulder Opener
        • Lie on a Foam Roller with the spine and heal supported and the arms relaxed at your sides. Support the arms with pillows if needed. Let the shoulders roll back around the foam roller. Stretch for a minimum of 3 minutes. Perform diaphragmatic breathing while stretching.

To follow an instructional repetitive strain injury exercise program on DVD, check out Healthy Hands. Customize your workout choosing between stretches, range of motion, and strengthening segments. Bonus segments include core strengthening for posture, instruction in diaphragmatic breathing, and office ergonomic suggestions. This DVD is exercise-friendly for those just beginning an exercise program for injury recovery and prevention.

Marji Hajic is an Occupational Therapist and a Certified Hand Therapist practicing in Santa Barbara, California. For more information on hand and upper extremity injuries, prevention and recovery, visit Hand Health Resources.


This site needs an editor - click to learn more!

Add The+Shoulder+%26+Repetitive+Strain+Injuries to Twitter Add The+Shoulder+%26+Repetitive+Strain+Injuries to Facebook Add The+Shoulder+%26+Repetitive+Strain+Injuries to MySpace Add The+Shoulder+%26+Repetitive+Strain+Injuries to Del.icio.us Digg The+Shoulder+%26+Repetitive+Strain+Injuries Add The+Shoulder+%26+Repetitive+Strain+Injuries to Yahoo My Web Add The+Shoulder+%26+Repetitive+Strain+Injuries to Google Bookmarks Add The+Shoulder+%26+Repetitive+Strain+Injuries to Stumbleupon Add The+Shoulder+%26+Repetitive+Strain+Injuries to Reddit




The Neck & Repetitive Strain Injuries
Perfect Posture - The Basics
Rounded Shoulders & Forward Head Posture
RSS
Related Articles
Editor's Picks Articles
Top Ten Articles
Previous Features
Site Map


For FREE email updates, subscribe to the Ergonomics Newsletter


Past Issues


print
Printer Friendly
bookmark
Bookmark
tell friend
Tell a Friend
forum
Forum
email
Email Editor


Content copyright © 2014 by Marji Hajic. All rights reserved.
This content was written by Marji Hajic. If you wish to use this content in any manner, you need written permission. Contact BellaOnline Administration for details.

g


g features
Wraptastic Product Review

Dragon Naturally Speaking - Voice Recognition

DeQuervain's Tenosynovitis-Thumb and Wrist Pain

Archives | Site Map

forum
Forum
email
Contact

Past Issues
memberscenter


vote
Poetry
Daily
Weekly
Monthly
Less than Monthly



BellaOnline on Facebook
g


| About BellaOnline | Privacy Policy | Advertising | Become an Editor |
Website copyright © 2014 Minerva WebWorks LLC. All rights reserved.


BellaOnline Editor