Date Approved


Degree Type

Open Access Thesis

Degree Name

Master of Science (MS)

Department or School

Health Promotion and Human Performance

Committee Member

Stephen J McGregor, Ph.D., Chair

Committee Member

Erik Bollt, Ph.D.

Committee Member

Christopher Herman, Ph.D


The purpose of this study was to determine if the blood lactate threshold could be identified through the visual examination of the control entropy of high-resolution accelerometry in intercollegiate endurance runners (n=7).

In procedures approved by the Eastern Michigan University College of Health and Human Services Human Subject Review Board, runners performed two lactate threshold tests to determine the relationship between the pace of running and the blood lactate concentration. High-resolution accelerometry (HRA) data as well as the metabolic cost of exercise was also collected during these trials.

Control entropy (CE) analysis was conducted on the HRA of each individual plane of motion. Visual examination of the CE of the accelerations of the vertical and medio-lateral planes of motion revealed a relationship with the decline of CE, indicative of constraint, at paces which corresponded with an increase in blood lactate concentration of 1mmol/L above baseline.


Additional committee member: Joseph Hornyak, M.D., Ph.D.