American Association for the Advancement of Science National Conference

| 2020

Bipedal Perils for Patients: Peak Braking and Propulsive Forces in Gradient Walking

Background

Protecting a healing injury to the lower extremity often requires limiting the forces applied through ambulation. Lower extremity postoperative patients navigate a wide variety of terrains and obstacles once they regain mobility but are still in recovery. These terrains influence the peak braking and propulsive ground reaction forces (GRFs) and pressure distribution across the footbed over multiple gait cycles, but this information that is crucial to patient recovery is relatively unexplored. Most biomechanical and kinematic walking studies have been constrained to the laboratory or to track setups. These protocols do not fully capture the adaptations humans make for the surfaces they traverse outside of laboratory environs, particularly on sloped surfaces such as ramps, which lower-extremity postoperative patients often prefer as an accessible alternative to stairs. Before work can be undertaken using postoperative patients, understanding the effect of gradient on forces in control subjects is imperative.

Methods

The data were collected from eleven participants aged 20 to 42 years without gait pathology or injury. Each participant was fitted to a pair of wireless pressure-sensing insoles with an array of force sensors distributed across each insole surface. Participants were asked to walk on a treadmill at 0.89m/s, 1.34m/s, and 1.79m/s for 60 seconds at each velocity, as well as on a treadmill set to a 10% slope at 0.89m/s. Participants then walked along a straight, flat, 78.4 meter indoor walkway and in a straight line on an outdoor sidewalk downhill and uphill 70.5 meters over an 8.75% slope. We analyzed 6711 steps total.

Results

We found that peak braking and propulsive GRFs differ significantly between surface types and walking speeds when we control for participant mass and velocity, and downhill walking results in significantly higher peak braking forces than any other tested walking condition, including fast (1.79m/s) walking when we control for velocity (p<0.001).

Conclusions

It is imperative for the improvement of patient rehabilitation protocols that we understand the peak GRFs that occur when a patient is regaining mobility. Ramps are usually suggested as the preferred alternative to stairs during patient recovery, but the forces generated on inclines and declines should not be discounted as negligible during recovery. Patients already struggle to maintain consistency and adherence to postoperative protocols on flat surfaces, gradients could have an unexplored impact on recovery as well.

Schlagwörter

Lower extremity, Ground reaction forces, Pressure distribution

Autoren

A. G. Hammerberg

Institution / Department

University of Washington

Wir haben Dein Interesse geweckt?

moticon-rego-sensor-insoles-opengo-rego

Sei immer einen Schritt voraus!

Folge uns auf LinkedIn

Und abonniere unseren Newsletter, um die neuesten Informationen über Fallstudien, Produkt-Updates und Unternehmensnachrichten zu erhalten.

Select your desired system

The cutting edge test based outcome assessment system for health professionals and trainers

The most versatile toolkit for free data acquisition and comprehensive analytics in research

Have a general inquiry?

Write us a message for general questions about products and solutions or if you’d like to discuss other topics.


Wähle Deine Produktelinie

Mobile Ganganalysen und sportmotorische Tests für Trainer und Therapeuten – objektiv und effizient.

Das flexible System für freie Datenerfassung und fortgeschrittene Analysen in der Forschung.

Du möchtest eine Anfrage stellen?

Schreibe uns eine Nachricht zu allgemeinen Fragen über Produkte oder zu anwendungsbezogenen Themen, die Du besprechen möchtest.


Das Formular wurde erfolgreich gesendet.

Wir werden uns in Kürze mit dir in Verbindung setzen.

moticon-rego-sensor-insole-live-event

Immer einen Schritt voraus!

Abonniere unseren Newsletter für die neuesten Informationen zu Fallstudien, Webinaren, Produkt-Updates und Neuigkeiten bei Moticon

Hole dir Unterstützung

Finde Antworten zu den häufigsten Fragen in unseren FAQ

Beschreibe Dein Problem so detailliert wie möglich. Hänge Screenshots oder Daten an, sofern das hilfreich ist.


Need help?
Want a live demo?
Interested in prices?
Want to say hello?
Always just a call away
+49 89 2000 301 60
Du brauchst Unterstützung?
Du möchtest eine Live Demo?
Interessiert an Preisen?
Du hast Fragen?
Nur einen Anruf entfernt
+49 89 2000 301 60

The form was sent successfully.

You will be contacted shortly.

Get support

Check our FAQ database for answers to frequently asked questions

Describe your issue in as much detail as possible. Include screenshots or files if applicable.