high resolution mems accelerometers to estimate vo2 and compare running mechanics between highly trained inter-collegiate and untrained runners高分辨率mems加速度计估计携氧量和比较跑步训练有素的inter-collegiate之间的力学和未经训练的跑步者.pdfVIP

High Resolution MEMS Accelerometers to Estimate VO2 and Compare Running Mechanics between Highly Trained Inter-Collegiate and Untrained Runners 1 1 2 3 Stephen J. McGregor *, Michael A. Busa , James A. Yaggie , Erik M. Bollt 1 Applied Physiology Laboratory, Eastern Michigan University, Ypsilanti, Michigan, United States of America, 2 College of Health Professions, University of Findlay, Findlay, Ohio, United States of America, 3 Department of Mathematics Computer Science, Clarkson University, Potsdam, New York, United States of America Abstract Background: The purposes of this study were to determine the validity and reliability of high resolution accelerometers (HRA) relative to VO2 and speed, and compare putative differences in HRA signal between trained (T) and untrained (UT) runners during treadmill locomotion. Methodology: Runners performed 2 incremental VO2max trials while wearing HRA. RMS of high frequency signal from three axes (VT, ML, AP) and the Euclidean resultant (RES) were compared to VO2 to determine validity and reliability. Additionally, axial rms relative to speed, and ratio of axial accelerations to RES were compared between T and UT to determine if differences in running mechanics could be identified between the two groups. Principal Findings: Regression of RES was strongly related to VO , but T was different than UT (r = 0.96 vs 0.92; p,.001) for 2 walking and running. During walking, only the ratio of ML and AP to RES were different between groups. For running, nearly all acceleration parameters were lower for T than UT, the exception being ratio of VT to RES, which was higher in T than UT. All of these differences during running were despite higher VO2