Rashelle Mason’s left arm was numb. Her stomach shut down to the point where she no longer could take even small sips of an electrolyte drink from a straw. Her mind started to fight her, too, with ...

A 62-year-old former Marine reclaimed a world record he originally set in 2011 by holding an abdominal plank for an astonishing eight hours earlier this month, the Guinness Book of World Records ...

Although Erika Rischko set a new nine-minute plank record at the end of August, it wasn't a feat she'd set herself the goal of accomplishing. As it turns out, the 85-year-old fitness influencer from ...