The ambulatory measurement of posture, thigh acceleration, and muscle tension and their relationship to heart rate

M T Tuomisto, D W Johnston, T F H Schmidt, Derek Johnston

Research output: Contribution to journalArticle

19 Citations (Scopus)


We compared the relative ability of continuous accelerometric, electromyographic (EMG), and hydrostatic posture measurements to discriminate tasks involving variations in motor activity and posture and to predict heart rate (HR) variability. EMG was a more sensitive measure than accelerometry in differentiating the tasks. However, accelerometry and EMG explained comparable amounts of HR variance. The hydrostatic posture was a stable measure that clearly differentiated postures and explained a significant amount of HR variance but less than accelerometry or EMG. Accelerometric and EMG measures of motor activity used either alone or in combination with the hydrostatic posture are valuable in discriminating activities and in controlling for the effects of motor activity and posture on HR during ambulatory measurement.

Original languageEnglish
Pages (from-to)409-415
Number of pages7
Issue number4
Publication statusPublished - Jul 1996



  • Adult
  • Electromyography
  • Heart Rate
  • Humans
  • Male
  • Movement
  • Muscle Contraction
  • Muscle, Skeletal
  • Posture
  • Thigh

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