Changes in propulsion technique and shoulder complex loading following low-intensity wheelchair practice in novices

PLoS ONE, 2018 · DOI: https://doi.org/10.1371/journal.pone.0207291 · Published: November 9, 2018

Spinal Cord Injury Rehabilitation Biomechanics

Simple Explanation

The study investigates how changes in wheelchair propulsion technique affect shoulder load in new wheelchair users. It aims to understand if improving propulsion technique can reduce shoulder injury risk. Researchers examined how 80 minutes of low-intensity wheelchair practice, spread over 3 weeks, influenced both propulsion technique and the forces experienced by the shoulder joint. The study found that while propulsion technique improved, individuals used different movement strategies, leading to varying shoulder load patterns. Some increased shoulder load, while others decreased it.

Study Duration

3 weeks

Participants

Seven able-bodied men

Evidence Level

Not specified

Key Findings

1
Participants decreased push frequency and increased contact angle after the practice sessions.
2
The excursion of the upper arm increased, approaching significance.
3
The mean glenohumeral reaction force per cycle decreased by 13%, approaching significance.

Research Summary

This study examined the changes in shoulder loading accompanying the typical changes in propulsion technique following 80 min of low-intensity wheelchair practice distributed over 3 weeks. Despite homogenous changes in propulsion technique, the kinematic solution to the task varied among the participants. Participants exhibited two glenohumeral reaction force distribution patterns: 1) Two individuals developed high force at the onset of the push, leading to increased peak and mean glenohumeral forces 2) Five individuals distributed the force more evenly over the cycle, lowering both peak and mean glenohumeral forces.

Practical Implications

Technique Variability

Despite uniform improvements in propulsion, kinematic solutions vary, highlighting the need for personalized training.

Force Distribution

Even force distribution during propulsion is key to reducing shoulder load and injury risk.

Individualized Assessment

Assessment of individual propulsion characteristics and shoulder loading patterns is crucial for effective interventions.

Changes in propulsion technique and shoulder complex loading following low-intensity wheelchair practice in novices

Simple Explanation

Key Findings

Research Summary

Practical Implications

Technique Variability

Force Distribution

Individualized Assessment

Study Limitations

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Was this summary helpful?

Changes in propulsion technique and shoulder complex loading following low-intensity wheelchair practice in novices

Simple Explanation

Key Findings

Research Summary

Practical Implications

Technique Variability

Force Distribution

Individualized Assessment

Study Limitations

Your Feedback

Was this summary helpful?