BioProc2/3 Analog data processing Part Three Impact, Work and Force Analysis Techniques

Gait & Biomechanics Laboratory, University of Ottawa Introduction Download bpwin2.zip or bpwin2.exe from CSB website http://www.csb-scb.com go to Software and then to BioProc2 http://www.health.uottawa.ca/biomech/csb/Software/bioproc2.htm installs all necessary device drivers only needs to be done once to get latest version use the Update from Internet item in the Help menu Gait & Biomechanics Laboratory, University of Ottawa

Force transducer calibration use Pearson Correlation from Correlation menu (new) after correlation and regression coefficients are computed you are prompted to apply one of the regression equations to the original data use Scaling menu from Analysis menu to scale data to any units Gait & Biomechanics Laboratory, University of Ottawa

Force platform analyses use submenu Analyze Force Plate Data from Analysis menu two plates can be combined (Combine Two Plates) impulse computed (from integration statistics) changes in centres of gravity estimated (Centre of Gravity) Gait & Biomechanics Laboratory, University of Ottawa

Centre of mass calculations requires subject to have static initial conditions can compute takeoff velocity, height after takeoff, lowest and highest positions during period of stance for all three directions, work done and jumping power (new) high-pass filtering reduces drift Gait & Biomechanics Laboratory, University of Ottawa

Gait & Biomechanics Laboratory, University of Ottawa Angular Impulse use Work or Angular Impulse Analysis from Integration Statics submenu of Analysis menu requires data file that contains moments (from Vicon or Visual3D ASCII export) moments must be in the first half of the data file, second half may contain powers Gait & Biomechanics Laboratory, University of Ottawa

External, Internal and Total Work use Work or Angular Impulse Analysis from Integration Statics submenu of Analysis menu requires data file that contains moment powers (from Vicon or Visual3D ASCII export) powers must be in first half or all of the data file average work, sum of positive and negative work and external, internal and total mechanical work done are computed for each axis sums for each axis and total for all axes are also computed calculates percent contributions for each moment Gait & Biomechanics Laboratory, University of Ottawa

Moment Power Analysis (Work Bursts) use Moment Power Analysis from Integration Statics submenu of Analysis menu requires data file that contains moment powers (from Vicon or Visual3D ASCII export) computes work bursts and peak moments and powers whenever power changes from positive to negative or moment changes from positive to negative set a threshold to eliminate small bursts of power Gait & Biomechanics Laboratory, University of Ottawa

Impact (GSI and HIC) Analyses use GSI and HIC (Impacts) from Integration Statics submenu of Analysis menu needs one channel of acceleration data scaled to g’s or m/s2 second channel may contain triggering information (no longer used) computes Gadd Severity Index for head impacts only (i.e., uses a2.5) (new) average acceleration, A-3 and HIC, integral, delta g and time to peak acceleration HIC is only done for the maximum allowable time interval Gait & Biomechanics Laboratory, University of Ottawa