The treadmill is present in nearly every gym — and for good reason. Treadmills are a versatile piece of cardio equipment that allow you to burn calories, build lower body strength, and get in ...
Share on Pinterest The 12-3-30 treadmill challenge is trending on TikTok, but can the viral workout really help you lose weight? M_a_y_a/Getty Images TikTok users claim the 12-3-30 treadmill challenge ...
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