Use reasoning to lead to the answer of the following question:
What do you need to wear when hiking?\nOptions:\n- cast iron stomach\n- physical exertion\n- shin splints\n- adventure\n- fatigue
 Reasoning process:
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Wearing Shin splints protects legs from causing acute pain in the shin and lower leg caused by prolonged running, typically on hard surfaces. Shin splints protects our leg muscles from getting stretched. Therefore, the final answer is shin splints.
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