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21 November, 01:50

when observing a runner-what physical evidence is there to suggest that the circulatory and respiratory systems rates are both increasing?

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  1. 21 November, 03:03
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    The physical evidence that suggest an increase in both respiratory and circulatory rate of a runner is that his/her heart beat (pulse) iinreases significantly and the runner breathes heavily in other to let in more air into his/her body.
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