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Respiration and heart rates change greatly during physical activity. How much they fluctuate can depend on the intensity and duration of the workout. Respiration and heart rate will double at times during an exercise routine.

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Q: What are the changes in respiration and heart rates during physical activity of varied intensity and duration?
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how hard you work at the physical activity each time you are physically active. ---------------------------_@@@@@@@_ --------------------------@___________@ -----------------------@_@________@__@ ---------------------@___@______@____@ -------------------@_____@____@______@ -------------------@______@__@_______@ -------------------@_______@@________@ -------------------@________@________@ --------------------@_______@________@ ---------------------@______@________@ ----------------------@_____@_______@ -----------------------_@@@@@@@@@_ -----------------------------APEX =)


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