caa a22 4500 467941181 CHVBK 20180406153013.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1007/s00421-005-0112-6 doi (NATIONALLICENCE)springer-10.1007/s00421-005-0112-6 Effect of combined movement and heart rate monitor placement on physical activity estimates during treadmill locomotion and free-living [Elektronische Daten] [Søren Brage, Niels Brage, Ulf Ekelund, Jian'an Luan, Paul Franks, Karsten Froberg, Nicholas Wareham] A placement effect on activity measures from movement sensors has been reported during treadmill and free-living activity. Positioning of electrodes may impact on movement artifact susceptibility as well as surface ECG waveform amplitudes and thus potentially on the precision by which heart rate (HR) is ascertained from such ECG traces. The purpose of this study was to examine the extent to which placement of the combined HR and movement sensor, Actiheart, influences measurement of HR and movement, and estimates of energy expenditure. A total of 24 participants (20-39years, 45-109kg, 1.54-2.05m, 19-29kgm−2) were recruited. Whilst wearing two monitors, one placed at the level of the third intercostal space (upper position) and one just below the apex of the sternum (lower position), study participants performed level walking, incline walking, and level running on treadmill, and completed at least one day of free-living monitoring. Placement differences in HR data quality, movement counts, and energy expenditure (estimated from combined HR and movement) were analyzed with regression techniques. Quality of HR data was generally higher when monitors were placed in the lower position. This effect was more pronounced in men during both treadmill activity (relative risk, RR [95% CI] of noisy HR data in upper vs. lower position, RR=1.3[0.3; 5.6] in women, RR=174[14; 2,156] in men) and during free-living (RR=1.2[0.4; 3.3] in women, RR=25[9.6; 67] in men). There were minor placement differences (≤8%) in movement counts only in women during incline walking and running. During free-living, no placement effect on counts was observed. In all test scenarios, estimates of energy expenditure from the two positions were not significantly different. Positioning the Actiheart at the level below the sternum may yield cleaner HR data. Regardless of which position is used, this has little or no effect on movement counts and energy expenditure estimates, which is encouraging for studies where research participants may have to position the monitors themselves. Springer-Verlag, 2005 Monitoring nationallicence Energy expenditure nationallicence Accelerometry nationallicence Body movement nationallicence Epidemiology nationallicence Measurement nationallicence Brage Søren MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut Brage Niels Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark aut Ekelund Ulf MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut Luan Jian'an MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut Franks Paul MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut Froberg Karsten Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark aut Wareham Nicholas MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut European Journal of Applied Physiology Springer-Verlag 96/5(2006-03-01), 517-524 1439-6319 96:5<517 2006 96 421 https://doi.org/10.1007/s00421-005-0112-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-005-0112-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Brage Søren MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut NATIONALLICENCE 700 1- Brage Niels Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark aut NATIONALLICENCE 700 1- Ekelund Ulf MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut NATIONALLICENCE 700 1- Luan Jian'an MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut NATIONALLICENCE 700 1- Franks Paul MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut NATIONALLICENCE 700 1- Froberg Karsten Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark aut NATIONALLICENCE 700 1- Wareham Nicholas MRC Epidemiology Unit, Institute of Public Health, University of Cambridge, Elsie Widdowson Laboratory, Fulbourn Road, CB1 9NL, Cambridge, United Kingdom aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 96/5(2006-03-01), 517-524 1439-6319 96:5<517 2006 96 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer