title: Unobtrusive heart rate estimation during physical exercise using photoplethysmographic and acceleration data.
abstract: Photoplethysmography (PPG) is a non-invasive, inexpensive and unobtrusive method to achieve heart rate monitoring during physical exercises. Motion artifacts during exercise challenge the heart rate estimation from wrist-type PPG signals. This paper presents a methodology to overcome these limitation by incorporating acceleration information. The proposed algorithm consisted of four stages: (1) A wavelet based denoising, (2) an acceleration based denoising, (3) a frequency based approach to estimate the heart rate followed by (4) a postprocessing step. Experiments with different movement types such as running and rehabilitation exercises were used for algorithm design and development. Evaluation of our heart rate estimation showed that a mean absolute error 1.96 bpm (beats per minute) with standard deviation of 2.86 bpm and a correlation of 0.98 was achieved with our method. These findings suggest that the proposed methodology is robust to motion artifacts and is therefore applicable for heart rate monitoring during sports and rehabilitation.
authors.forename: Patrick
authors.initials: P
authors.lastname: Mullan
authors.forename: Christoph M
authors.initials: CM
authors.lastname: Kanzler
authors.forename: Benedikt
authors.initials: B
authors.lastname: Lorch
authors.forename: Lea
authors.initials: L
authors.lastname: Schroeder
authors.forename: Ludwig
authors.initials: L
authors.lastname: Winkler
authors.forename: Larissa
authors.initials: L
authors.lastname: Laich
authors.forename: Frederik
authors.initials: F
authors.lastname: Riedel
authors.forename: Robert
authors.initials: R
authors.lastname: Richer
authors.forename: Christoph
authors.initials: C
authors.lastname: Luckner
authors.forename: Heike
authors.initials: H
authors.lastname: Leutheuser
authors.forename: Bjoern M
authors.initials: BM
authors.lastname: Eskofier
authors.forename: Cristian
authors.initials: C
authors.lastname: Pasluosta
mesh_terms: D000465:Algorithms; D016477:Artifacts; D015444:Exercise; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D017156:Photoplethysmography; D012420:Running / Q000502:physiology; D012815:Signal Processing, Computer-Assisted; D058067:Wavelet Analysis