Assertion: treadmill | /r/CapableOf | require navigating around pothole
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text: There’s also the control factor: Treadmills allow you to train at a consistent pace (which can be hard to do outdoors), they don’t require navigating around potholes or stray branches, there’s less joint stress than with asphalt or concrete, and they’re far safer for those who want to zone out and run with music.