A new device to estimate VO2 during incline walking by accelerometry and barometry
Yamazaki, 2009
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A new device to estimate VO2 during incline walking by accelerometry and barometry
Yamazaki, 2009
A model to predict oxygen consumption (mL/kg/min) during walking was developed in adults in the laboratory and cross-validated in a sub-sample of participants on an outdoor trail. The model uses acceleration and vertical upward and downward speed, as determined by changes in barometric pressure, as inputs. Correlation between predicted and actual oxygen consumption was 0.879 with a mean difference of -0.2 mL/kg/min.
Sample: 42 (21 males) healthy adults, 63±7 years of age
Setting: Laboratory
Activities: Stationary, treadmill walking
Criterion: MetaMax 3b (VO2)
Accelerometer(s): ADXL210JE on right or left waist
Validation approach: Cross-validation using additional visit by sub-sample of participants who walked on an outdoor trail
A model to predict oxygen consumption (mL/kg/min) from vector magnitude (VM in g), vertical upward speed (Hu in m/min), and the vertical downward speed (Hd in m/min) is provided. VM is an integration of total acceleration (square root of the sum of the squared acceleration in each axis) for the period minus VM during rest. Hu and Hd were calculated either using an equation incorporating treadmill speed (m/min) and incline (%) (left) in the laboratory or using changes in device-measured barometric pressure in field-based observations (right).
Yamazaki, T., Gen-No, H., Kamijo, Y. I., Okazaki, K., Masuki, S., & Nose, H. (2009). A new device to estimate VO2 during incline walking by accelerometry and barometry. Medicine and Science in Sports and Exercise, 41(12), 2213-2219. https://doi.org/10.1249/MSS.0b013e3181a9c452 Link to Paper
Corresponding author: Hiroshi Nose, nosehir@shinshu-u.ac.jp
Kimberly Clevenger at accelerometerrepository@gmail.com