Heart Rate Formula - Mechanical Engineering Assignment Help

Various factors including vagal tone, body position, blood volume and depth of respiration control the input to the heart. The heart responds by pumping blood into the arterial circulation.

The amount per beat in ml. is called the stroke volume (SV). The total cardiac output is the stroke volume multiplied by the heart rate. The total cardiac output increases with the exercise, depending on the efficiency of the system, up to about 30 ltr/minute in a well conditioned athlete.

An individual’s ability to increase cardiac output is the most important factor limiting the ability to increase physical work capacity.

Heart Rate Formula

It has been shown and assumed that a healthy 20 years individual would be able to maximize his cardiac output attaining a heart rate of 220/min. It declines by 10 points for every decade in advancing age. This is considered as maximum heart rate attainable during maximum exercise and termed as maximum heart rate (MHR). However, if the subject can attain 85 per cent of MHR it is considered for practical purpose to have achieved adequate exercise and termed as target heart rate (THR). Hence, in a deconditioned subject one thrives to achieve THR rather than MHR.

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