TY - JOUR
T1 - Metabolic rate prediction by massless actigraphy for outdoor activities
AU - Berlin, Shai
AU - Shalit, Liron
AU - Yarom, Yoni
AU - Moran, Daniel S.
PY - 2007/8
Y1 - 2007/8
N2 - Purpose: In military scenarios, there is a need for a system that can enable identification of possible future injury during different activities that are considered to be physically strenuous. The purpose of the present study was to determine whether the use of an octagonal actigraph in conjunction with heart rate (fc) measurements could serve as an accurate method for metabolic rate estimation for different free-living activities in field settings. Methods: Twenty young healthy volunteers (10 men, 22 ± 3 years of age, and 10 women, 23 ± 3 years of age) participated in this study. All participants were exposed to six different activities (walking, running, sweeping, climbing and descending stairs, and shopping). Continuous actigraphic measurements were collected from the hip and wrist, fc was monitored with a Polar chest belt, and oxygen consumption (VO2) was measured with a K4b2 system. Results: A prediction model for VO2 was constructed from actigraphic and fc measurements. Comparisons between predicted and measured VO2 values revealed high correlations (hip, R2 = 0.842; wrist, R 2 = 0.822). Conclusions: This new prediction model highly correlated with VO2 measurements. The hip was found to be more favorable than the wrist for assessment of VO2 for different free-living activities.
AB - Purpose: In military scenarios, there is a need for a system that can enable identification of possible future injury during different activities that are considered to be physically strenuous. The purpose of the present study was to determine whether the use of an octagonal actigraph in conjunction with heart rate (fc) measurements could serve as an accurate method for metabolic rate estimation for different free-living activities in field settings. Methods: Twenty young healthy volunteers (10 men, 22 ± 3 years of age, and 10 women, 23 ± 3 years of age) participated in this study. All participants were exposed to six different activities (walking, running, sweeping, climbing and descending stairs, and shopping). Continuous actigraphic measurements were collected from the hip and wrist, fc was monitored with a Polar chest belt, and oxygen consumption (VO2) was measured with a K4b2 system. Results: A prediction model for VO2 was constructed from actigraphic and fc measurements. Comparisons between predicted and measured VO2 values revealed high correlations (hip, R2 = 0.842; wrist, R 2 = 0.822). Conclusions: This new prediction model highly correlated with VO2 measurements. The hip was found to be more favorable than the wrist for assessment of VO2 for different free-living activities.
UR - http://www.scopus.com/inward/record.url?scp=34547938914&partnerID=8YFLogxK
U2 - 10.7205/MILMED.172.8.882
DO - 10.7205/MILMED.172.8.882
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C2 - 17803084
AN - SCOPUS:34547938914
SN - 0026-4075
VL - 172
SP - 882
EP - 887
JO - Military Medicine
JF - Military Medicine
IS - 8
ER -