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Design Innovation Paper

Design and Validation of a Heart Rate and Speed Monitoring Device With Intelligently Controlled Assistive Rehabilitation Elliptical

[+] Author and Article Information
Chase M. Pfeifer

Institute for Rehabilitation Science and Engineering,
Madonna Rehabilitation Hospitals,
5401 South Street,
Lincoln, NE 68506
e-mail: cpfeifer@madonna.org

Douglas A. Rowen

Department of Biomechanics,
6160 University Drive,
South Omaha, NE 68182
e-mail: darowen@unomaha.edu

Thad W. Buster

Institute for Rehabilitation Science and Engineering,
Madonna Rehabilitation Hospitals,
5401 South Street,
Lincoln, NE 68506
e-mail: tbuster@madonna.org

Guilherme M. Cesar

Institute for Rehabilitation Science and Engineering,
Madonna Rehabilitation Hospitals,
5401 South Street,
Lincoln, NE 68506
e-mail: gcesar@madonna.org

Sonya L. Irons

Institute for Rehabilitation Science and Engineering,
Madonna Rehabilitation Hospitals,
5401 South Street,
Lincoln, NE 68506
e-mail: sirons@madonna.org

Judith M. Burnfield

Institute for Rehabilitation Science and Engineering,
Madonna Rehabilitation Hospitals,
5401 South Street,
Lincoln, NE 68506
e-mail: jburnfield@madonna.org

1Corresponding author.

Manuscript received November 15, 2017; final manuscript received August 20, 2018; published online November 5, 2018. Assoc. Editor: Michael Eggen.

J. Med. Devices 13(1), 015002 (Nov 05, 2018) (4 pages) Paper No: MED-17-1348; doi: 10.1115/1.4041337 History: Received November 15, 2017; Revised August 20, 2018

Cardiovascular assessment and fitness training are often overlooked in physical rehabilitation. Many current rehabilitation exercise devices do not allow for the recording and exportation of variables related to cardiovascular fitness. Therefore, the purpose of this work was to design, prototype, and validate a data logger that measures, records, and exports time, heart rate (HR), and speed data with the commercially available rehabilitation device called the Intelligently Controlled Assistive Rehabilitation Elliptical (ICARE). Validation involved using the data logger device in parallel with devices currently used in research environments for measuring HR (TrueOne 2400 metabolic cart with polar HR monitoring chest strap) and speed (ICARE's console). Ten healthy individuals without known disability impacting walking or ability to use the ICARE, exercised on the ICARE while HR and ICARE speed were measured. It was found that the data logger can be used to accurately measure, record, and export HR (linear regression: P < 0.001; R2 = 0.892) and speed (linear regression: P < 0.001; R2 = 0.997) data when used with the ICARE.

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References

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Figures

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Fig. 1

Block diagram of the components making up the data logger (left) and the assembled data logger (right)

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Fig. 2

Comparison of TrueOne 2400 versus data logger HR values for active assist and active assist plus modes (nine participants, 2492 data points)

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Fig. 3

Difference in HR data (TrueOne 2400—data logger) versus average HR for nine subjects during active assist and active assist plus conditions (nine participants, 18 data points)

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Fig. 4

Comparison of speed (RPM) documented via ICARE console versus value calculated using the data logger (58 data points)

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Fig. 5

Difference in speed data (ICARE—data logger) versus average speed during active assist condition without human subject (58 data points)

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