Have you seen the viral "Chair Challenge" making its way through your social media feeds? The premise is simple: 1. Take three steps away from a wall 2. Place a chair in front of you 3. Put your head against the wall 4. Stand up and lift the chair Sounds simple enough - except only women can do it. Rafael Bahamonde, dean of the IUPUI School of Health & Human Sciences, explains the science behind this enigma. | IU Indianapolis

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