Don't take that last run if you're feeling worn out. Leave it at that. A lot of injuries happen because people become fatigued and lose that mental and physical presence.

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People should consider wearing a helmet, but the key thing is not having false expectations of helmets. Sometimes helmets can give false sense of security, and that's like the last thing we want.

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It's easy to get distracted or go too fast. You want to make sure you always have a sense of speed or control -- really a physical and mental presence.

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