JAPANESE CIRCULATION JOURNAL
Clinical Study
Development of a Servo-Controller of Heart Rate Using a Treadmill
Toru KawadaGenshiro SunagawaHiroshi TakakiToshiaki ShishidoHiroshi MiyanoHiroshi MiyashitaTakayuki SatoMasaru SugimachiKenji Sunagawa
Author information
JOURNALS FREE ACCESS

Volume 63 (1999) Issue 12 Pages 945-950

Details
Download PDF (547K) Contact us
Abstract

Although treadmill exercise involves a more familiar range of motions and is thus more physiological in terms of daily activity than cycle ergometer exercise, difficulties in controlling the exercise intensity have limited its utility. As heart rate (HR) has been used as a measure of exercise intensity, controlling HR should allow for the proper control of exercise intensity during treadmill exercise. Thus, a servo-controller framework was applied to regulate HR during treadmill exercise. After estimating an averaged transfer function from speed command to HR, feedback parameters were optimized via a computer simulation in order to achieve a quick and stable HR response. The performance of the servo-controller of HR was then examined in 10 healthy subjects. Standard deviations of the steady-state difference between the target and measured HRs were 2.7±0.9 and 5.0±1.4 beats/min in the stepwise and ramp target HR protocols, respectively. The rise time to reach 90% of the target HR was 93±20 s in the stepwise protocol. It was concluded that a treadmill implemented with a negative feedback mechanism made it possible to precisely regulate HR and thus exercise intensity. (Jpn Circ J 1999; 63: 945 - 950)

Information related to the author
© 1999 THE JAPANESE CIRCULATION SOCIETY
Previous article Next article

Recently visited articles
feedback
Top