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Burning felt (a type of fabric) has nothing to do with strenuous activity.
WARM-UP
Strenuous muscular activity is basically a fancy way to say exercise. As muscles are worked harder, they demand more oxygen, so your breathing rate increases with strenuous muscular activity.
WARM-UP
false
When playing tennis, the arm is used as a 3rd class lever. Also, you can research how the human body reacts to such strenuous sporting activity.
potassium
False
To cool down is a period following strenuous physical activity in which stretching or milder exercise is performed to allow the body gradually to return to normal.
Could be growing pains or you did some strenuous activity with them.
Humans breath at a normal rate of about 18 to 20 breaths a minute. Respirations increase during exercise or strenuous activity to accommodate an increased need for O2.
No