Build strength and muscle at home with this 9-minute bodyweight flow that trains your whole body safely after 40.

• This ab workout is planking meets yoga flow. To wit: It’s called the Plank Flow. Rather than just holding a plain ol’ plank for minutes on end (boooring), you flow from side plank to reverse plank ...

According to Guinness World Records, Mao Weidong holds the title of "longest time in an abdominal plank position," clocking in at 08:01:00. Eight hours. Imagine that. Imagine holding a plank the ...