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• W1761661555 abstract "Physical exercise has significant benefits for humans in improving the health and quality of their lives, by improving the functional performance of their cardiovascular and respiratory systems. However, it is very important to control the workload, e.g. the frequency of body movements, within the capability of the individual to maximise the efficiency of the exercise. The workload is generally represented in terms of heart rate (HR) and oxygen consumption VO2. We focus particularly on the control of HR and VO2 using the workload of an individual body movement, also known as the exercise rate (ER), in this research. The first part of this report deals with the modelling and control of HR during an unknown type of rhythmic exercise. A novel feature of the developed system is to control HR via manipulating ER as a control input. The relation between ER and HR is modelled using a simple autoregressive model with unknown parameters. The parameters of the model are estimated using a Kalman filter and an indirect adaptive H1 controller is designed. The performance of the system is tested and validated on six subjects during rowing and cycling exercise. The results demonstrate that the designed control system can regulate HR to a predefined profile. The second part of this report deals with the problem of estimating VO2 during rhythmic exercise, as the direct measurement of VO2 is not realisable in these environments. Therefore, non-invasive sensors are used to measure HR, RespR, and ER to estimate VO2. The developed approach for cycling and rowing exercise predicts the percentage change in maximum VO2 from the resting to the exercising phases, using a Hammerstein model.. Results show that the average quality of fit in both exercises is improved as the intensity of exercise is increased." @default.
• W1761661555 created "2016-06-24" @default.
• W1761661555 creator A5029479931 @default.
• W1761661555 date "2014-03-15" @default.
• W1761661555 modified "2023-09-27" @default.
• W1761661555 title "Physiological Control of Human Heart Rate and Oxygen Consumption during Rhythmic Exercises" @default.
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• W1761661555 hasPublicationYear "2014" @default.
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