A new device to estimate VO2 during incline walking by accelerometry and barometry

Medicine and Science in Sports and Exercise
Toshiaki YamazakiHiroshi Nose

Abstract

To examine whether the biased estimation of oxygen consumption rate (VO2, mL x kg(-1) x min(-1)) by accelerometry during incline walking can be improved by the addition of altitude changes as measured by barometry. We measured VO2 by respiratory gas analysis and vector magnitude (VM, G) from triaxial accelerations in 42 healthy people (mean +/- SD age = 63 +/- 7 yr) during graded walking on a treadmill while the incline was varied from -15% to +15%. They walked at subjectively slow, moderate, and fast speeds on level and uphill inclines and, in addition to these, at their fastest speed at 0% incline. They then walked at approximately 3, 4, and 5 km x h(-1) on downhill inclines for 3 min each. We determined a regression equation to estimate VO2 from VM and theoretical vertical upward (Hu, m x min(-1)) and downward speeds (Hd, m x min(-1)) for the last 1 min of each trial. To validate the precision of the equation, we measured VM and altitude changes with a portable device equipped with a triaxial accelerometer and a barometer in 11 of the 42 subjects walking on an outdoor hill and compared the estimated VO2 with the value simultaneously measured by respiratory gas analysis. VO2 above resting was estimated from VO2 = 0.044 VM + 1...Continue Reading

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Citations

Mar 30, 2013·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Glen E DuncanGaetano Borriello
Mar 18, 2013·Archives of Environmental & Occupational Health·Hidenori TanakaMikito Kawamata
Apr 19, 2017·Exercise and Sport Sciences Reviews·Shizue MasukiHiroshi Nose
Feb 10, 2010·Hypertension·Shizue MasukiUNKNOWN Shinshu University Genetic Research Consortium
May 8, 2013·Scandinavian Journal of Medicine & Science in Sports·K OkazakiH Nose
Oct 24, 2014·Physiological Measurement·Michael B Del RosarioStephen J Redmond
Sep 16, 2009·The Journal of Physiology·Hiroshi NoseHirokazu Gen-No
Feb 9, 2017·BMC Sports Science, Medicine and Rehabilitation·Cecilie Fau BrinkløvMathias Ried-Larsen
Dec 29, 2017·International Journal of Biometeorology·Masahiro HoriuchiHiroshi Nose
Sep 2, 2017·Medicine and Science in Sports and Exercise·Koji UchidaHiroshi Nose
Jul 30, 2018·Biomedical Engineering Online·Motofumi NakanishiShigeho Tanaka

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