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    Physiological changes occur during exercise

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    Many physiological changes occur during exercise.
    a. Design a controlled experiment to test the hypothesis that an exercise session causes short-term increases in heart rate and breathing rate in humans
    b. Explain how at least three organ systems are affected by this increased physical activity and discuss interactions among these systems

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    Controlled experiment

    Many physiological changes occur during exercise. ?

    a. Design a controlled experiment to test the hypothesis that an exercise session causes short-term increases in heart rate and breathing rate in humans ?

    A controlled experiment means that you have a control group. For your experiment, the independent variable is the exercise session and the dependent variable is the heart and breathing rate.

    You need a control group because there are other things that can cause short-term increase in heart and breathing rate such as chemicals in the air, music, visual stimulus (watching an action movie, etc), etc.

    A sample experiment to test the above hypothesis could be as follows:

    The control group will not exercise and the experimental group will. The total experiment lasts 30 min.

    1- Measure heart and breathing rate at the beginning ...

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