Gait Cycle Phases, Events and Normalization

What is a gait cycle? What are movement phases and events in biomechanics research? What do these have to do with normalization? This video answers these questions through an example analysis of technique factors associated with running economy. Tips and software are provided for biomechanical analysis of time series data.
The discussion includes research questions, dependent and independent variables, biomechanical time series and joint angles. This is as well as linear length normalization, piecewise linear length normalisation, and their effect on mean and peak values. The biomechanics toolbar in Microsoft Excel is recommended for normalization and many other data analysis processes, as well as the interp1 function in Matlab.
Events mentioned include initial ground contact, midstance, toe-off, mid-swing, and initial contact again.
Gait cycle phases include the stance and swing phases, which are broken into the braking, propulsion, flight, initial swing, and terminal swing phases.
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00:00 Gait cycle phases, events and normalisation
00:19 Biomechanics research question: Running economy
00:30 Dependent variable: Running economy
00:42 What is a biomechanical time series?
01:00 What is a gait cycle?
01:20 Biomechanical events / key instants
01:33 What is a movement phase?
01:39 Phases and events of the gait cycle
02:48 What is time normalization?
03:26 Extracting means and peaks from time normalized data
03:56 Piecewise linear length normalization
04:25 Matlab and the Excel biomechanics toolbar
04:42 Statistical parametric mapping (SPM)
Running economy study: dx.doi.org/10.1249%2FMSS.0000...
Time normalization article: doi.org/10.1016/j.jbiomech.20...
Matlab interp1 function: uk.mathworks.com/help/matlab/...
Excel biomechanics toolbar: www.biomechanicstoolbar.org/
Statistical parametric mapping (SPM) tutorial: • Statistical Parametric...
Web: www.stuartmcnaylor.com
Twitter: / biomechstu
Monthly research newsletter: www.stuartmcnaylor.com/newsle...

[@biomechstu]

Thank you for watching. You can more biomechanics teaching videos here: kzbin.info/aero/PLI7VLEjUJidBdBP2IYFPcrX_lh1RGtNUf or a playlist of statistical parametric mapping tutorials here: kzbin.info/aero/PLI7VLEjUJidBBtyWFcZYF7f8t8IgMT9cg Please note that I do reply to questions/comments, but all previous responses have been lost in transitioning the channel over to my new email address.

[@mertdogan4164]

Thanks Stuart. Great video with awesome informations!

[@ajaychavan3951]

Thanks for the wonderful video Stuart! I want to know if we can do time normalization in Excel? if yes How?

[@saucesonice69]

Thank you for your explanation! I have a question, I have retrieved GRF data from force plate experiment and trying to normalize the data with the excel biomechanics toolbar which i have installed but couldnt seem to find the addin toolbar, can you help to solve this problem, or a video tutorial on it? Thank you beforehand 🙏🏻

[@saucesonice69]

*couldnt find the addin for the biomechanics toolbar, and im using excel 2016

[@biomechstu]

Hi Kevin. Because mine is already installed, it was difficult to check what to do. However, I notice that you can click File --> Options --> Add-Ins and then maybe manage your add-ins from within there (hopefully).

[@saucesonice69]

@@biomechstu Thank you for your response! I already installed it, and already tried to manage add ins and browsing it but the biomechanicstoolbar folder does not contain add in? or Am I missing something ?

[@biomechstu]

@@saucesonice69 Not sure if this helps, but within the folder there is a 'JOSKEvbm_Install' file. I seem to remember opening that file, and then when I closed it and opened a new Excel window the Add-In was there. I might have remembered incorrectly, though.