Answer: 2. Decrease blood flow
Explanation: Cool downs are meant to decrease blood and muscle activity
Well generally it will be a positive impact (Of course this generally depends on what the "Physical activity" is, it is generally good, reason being while exercising causes the brain to release endorphin's, as well as helping relax muscles and relieve physical tension, which can greatly help with stress.
D.) Keep your head up while your skating.
<span>Muscles are made of fibers?
-true
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