-------------------------------------------------------------------------------------------------- Primary Publications Associated With These Data: -------------------------------------------------------------------------------------------------- Article: “Do Humans Optimally Exploit Redundancy to Control Step Variability in Walking?” Authors: Jonathan B. Dingwell, Joby John, Joseph. P. Cusumano Journal: PLoS Computational Biology, 6(7): e1000856. Year: 2010 Article DOI: http://dx.doi.org/10.1371/journal.pcbi.1000856 Article: “Re-Interpreting Detrended Fluctuation Analyses of Stride-To-Stride Variability in Human Walking” Authors: Jonathan B. Dingwell, Joseph. P. Cusumano Journal: Gait & Posture, 32(3): 348-353. Year: 2010 Article DOI: http://dx.doi.org/10.1016/j.gaitpost.2010.06.004 Article: “Identifying Stride-To-Stride Control Strategies in Human Treadmill Walking” Authors: Jonathan B. Dingwell, Joseph. P. Cusumano Journal: PLoS ONE. Year: 2015 Contact: jdingwell@austin.utexas.edu jdingwell68@gmail.com University of Texas at Austin http://www.edb.utexas.edu/khe/nbl/ -------------------------------------------------------------------------------------------------- DESCRIPTION OF DATA AND DATA FILES: -------------------------------------------------------------------------------------------------- Subjects: Young Healthy (“YH”) Group: N = 17, 12M / 5F, Age 23.3 +/- 2.66 Yrs Older Healthy (“OH”) Group: N = 17, 11M / 6F, Age 72.3 +/- 6.10 Yrs What Subjects Did: Walk on a Motorized Treadmill 5 Walking Speeds: “Preferred” Speed (PWS) and PWS+/-10% and PWS+/-20% Number of Trials at Each Speed: 2 (10 Trials / Subject Total) Each Trial was 5 Min long. Motion capture data (Vicon) data for full duration of each trial. Stride Data were extracted from raw motion capture data (see publications for details). The Data: Two file types are provided: Matlab *.mat files and standard *.csv files Matlab *.mat files: One *.mat file for each subject: “YH01.mat”–“YH17.mat” and “OH01.mat”-“OH17.mat Each *.mat file contains 10 4-column matrices, one for each trial: “SPD1TR1” is “Speed 1, Trial 1”, etc Each matrix contains 4 columns, as follows: Col 1 = “Ln” = Stride Length [m] Col 2 = “Tn” = Stride time [s] Col 3 = “Sn” = Stride Speed [m/s] {where Sn = Ln./Tn} Col 4 = “Dn” = Net Displacement (i.e., Absolute Position) [m] Each row in each matrix corresponds to the 1 stride Comma-Delimited ASCII Text (*.csv) files: One *.csv file for each subject: “YH01.csv”–“YH17.csv” and “OH01.csv”-“OH17.csv Each *.csv file contains stride data for all trials for that subject Each *.csv file has 40 total columns: 4 for each trial, times 10 total trials Trials and variables for each column are labeled in the first 2 rows of each *.csv file Naming conventions for trials and variables are both same as above For both sets of files, trials that were either missing and/or had to be discarded due to technical issues with data collection contain only a single row of “9999”s. Please do *NOT* include these trials in any subsequent analyses!! -------------------------------------------------------------------------------------------------- Other Publications Associated with the Parent Study From Which These Data Originated: -------------------------------------------------------------------------------------------------- Kang HG, Dingwell JB (2009) Dynamics and Stability of Muscle Activations During Walking in Healthy Young and Older Adults. Journal of Biomechanics 42: 2231-2237. http://dx.doi.org/10.1016/j.jbiomech.2009.06.038 Kang HG, Dingwell JB (2009) Dynamic stability of superior vs. inferior segments during walking in young and older adults. Gait & Posture 30: 260-263. http://dx.doi.org/10.1016/j.gaitpost.2009.05.003 Kang HG, Dingwell JB (2008) The Effects of Walking Speed, Strength and Range of Motion on Gait Stability in Healthy Older Adults. Journal of Biomechanics 41: 2899–2905. http://dx.doi.org/10.1016/j.jbiomech.2008.08.002 Kang HG, Dingwell JB (2008) Separating the Effects of Age and Speed on Gait Variability During Treadmill Walking. Gait & Posture 27: 572-577. http://dx.doi.org/10.1016/j.gaitpost.2007.07.009