DOI: 10.5281/zenodo.3468501
title: Data: The effect of external lateral stabilization on the use of foot placement to control mediolateral stability in walking and running

description: Data and code for Mahaki et al. (2019): The effect of external lateral stabilization on the use of foot placement to control mediolateral stability in walking and running (https://doi.org/10.7717/peerj.7939). The Gas, Force, and Optotrak data.rar folder contains three subfolders as follows: <strong>Gasdata2</strong> - contains all oxygen data, plus a scripts to run the data. - Subjectxx - folder with oxygen data - MainMohammadRunning_EC - script to analyze the oxygen data. - EC_walkRun_Stat - script to statistically test the hypotheses in terms of energetic cost. The results have been presented in supplementary material (<strong>Fig. S5.</strong>) <strong>KinData</strong> - contains all kinematic and kinetic data (one folder per subject) - Marker.xlsx - info on which markers were placed where - Pointers.xlsx - info on which pointer trials contain which virtual markers - Trials.xlsx - info on which files contain which conditions - Subjectxx - folder with all the data. - The *.ndf files contain the kinematics (can be read with readndf.m, available in a subfolder of the VU 3d model (see below) - The *.afp files contain the raw voltage data from the force plates. These can be converted to forces and moments using the function FBW_dualbelt.m, available in a subfolder of the VU 3d model (see below). - The _HS.mat files contain calculated events (see script A below), and are normal matlab files. <strong>Software</strong> - contains all code used to get from the kinematic data to outcome variables, script were ran as: - A_Main_Heelstrikes - script which calculates heelstrikes, and prompts the user to check these. Results are saved in the same folder (and under same name, but with extension HS.mat) as original data. - B_Main_Calculate_step - script which was used to calculate main outcomes for each subject and condition. results of this script are stored in foot_placement_thorax.mat and used in subsequent scripts. - C_Combine_Test_Legs - script which was used to statistically investigate the effect of leg and speed on R<sup>2</sup> time series (lines 67-69). The results have been presented in Supplementary Material file (<strong>Fig. S1.</strong>). - D_main_plot_WalkRun_normalOnly - script which was used to check our second hypothesis which was the comparison between normal walking and running in terms of foot placement strategy. The results have been presented in <strong>Fig 4. & 5.</strong>. - E_main_plot_WalkRun - script which was used to check our third and fourth hypotheses which we investigated the effect of external lateral stabilization on R<sup>2</sup> values in walking and running (hypothesis 3) and differences of external lateral stabilization effect between walking and running (i.e. mode of locomotion X condition interaction, hypothesis 4) during swing phase. The results have been presented in <strong>Fig 5. and Fig 7.</strong>. - SW_SWvariability_WalkRun - script which was used to check our hypotheses in terms of step width and step width variability. The results have been presented in <strong>Fig 6</strong>. - F_Supplementary_main_plot_run - script which was used to compare R<sup>2</sup> values between running trials (speed effect) and the results have been presented in supplementary material (<strong>Fig .S2.</strong>).