Date of Award


Publication Type

Master Thesis

Degree Name




First Advisor

Andrews, D.


Health Sciences, Recreation.




The aim of this study was to quantify the relationship between heart rate determined physical activity levels (HR-PAL), and estimates of cumulative low back loads estimated from video records of non-occupational activities. Subjects were videotaped while performing self-determined, non-occupational activities within their own homes, for a period of 2 hours. Subject HR was continuously recorded during the data collection period. The 2-hour HR profile, along with subjects' height, mass, age, gender, and median sitting HR, were used as inputs into a regression-based mathematical model to estimate HR-PAL. The video data were captured to digital format at 3 samples/sec; the video was trimmed to match the heart rate file, and each task was then trimmed out into separate video image clips. The video clips were analyzed with the 3-D Match video analysis tool. At an alpha level of 0.05, quadratic regression equations were able to account for a significant amount of variance in cumulative compression force (R2 = 0.817), cumulative flexion moment (R2 = 0.757), and cumulative right axial twist moment (R2 = 0.769). (Abstract shortened by UMI.) Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2004 .A93. Source: Masters Abstracts International, Volume: 43-01, page: 0204. Adviser: David Andrews. Thesis (M.H.K.)--University of Windsor (Canada), 2004.