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Longitudinal Arch Angle (LAA): Inter-rater reliability comparing Relaxed Calcaneal Stance with Toe Off
Edward S. Glaser DPM, Stephen Goodman MS, David Fleming BS, Misty Shelby, Raymond Lovato, Eric Tidwell
The Foot and Ankle Online Journal 9 (2): 9

 

Link to the app:
https://fnd.io/#/us/ios-universal-app/1028449282-laangle-by-sole-supports

 

I just went to download this to take a look. Real shame - it costs $20 a month via a subscription to use it....

Interesting that whilst Sole Supports were acknowledged as funding the study there was no conflict of interest declared in the text (They essentially published a study of their own app, which requires user subscription - worth mentioning, no?).

Also, are we still using ICCs as a gold standard for reliability? Reckon Bland & Altman might have something to say about that.

 

That is a very serious conflict of interest not declared.

 

I wanted to comment about that on the article at the website, but they have closed the comments.

 

Under acknowledgements, they thank the employees of Sole Supports for their help and state the study was funded by Sole Supports. Seems clear to me.

Steven

 

It is usual practice to have a "disclosure of conflict of interest" statement.
But it is obvious from the authors place of employment and the acknowledgements of funding source... Not so obvious is it their app that they using.

 

I saw Ed Glasser in Savanah GA last weekend. Ed was trying to convince me that this measurement had some relation to plantar fascia tension because it was related to the distance between and first met head. He did not seem to understand that the hallux would dorsiflex in the heel off position and that would also alter the tension in the fascia.

Eric

 

Its a common misunderstanding. There was that paper a year or so ago by Sinclair (I think) that did 3d kinematics on distance between heel and 1st MPJ marker and called that 'windlass tension'

 

The use of a static measure to predict foot posture at midstance during walking
Thomas G. McPoil, PT, PHD, Jessica Ford, SPT, Joel Fundaun, SPT, Chelsea Gallegos, SPT, Andrew Kinney, SPT, Peter McMillan, SPT, Jessica Murphy, SPT, Elliot Sky, SPT, Derrick Torba, SPT, Michael Bade, PT, PhD
The Foot; Article in Press

 

Price has dropped to $4.99/month

 

Infomercial:

 

Prediction of the Longitudinal Arch Angle During Running for Various Foot Strike Patterns Using a Static Longitudinal Arch Angle Measurement
Norio Tsujimoto
J Am Podiatr Med Assoc. 2020 May 1;110(3)