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Biology, 30.01.2020 03:44 saraagracee

The best surface to run on is one that's
a. as hard as possible so that it adds more stability to your foot.
b. hilly so that you can improve your cardiovascular endurance.
c. smooth and soft so that it can cushion the stresses of running.
d. uneven so that the tendons and ligaments in the ankles and knees are strengthened.

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The best surface to run on is one that's
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