He stood his ground — literally.In a bid to explore the effects of prolonged standing on the human body, YouTuber Lucas Ball — known online as Pigmie — embarked on an unusual experiment: no sitting for five straight days.Inspired by expert recommendations to stand for two to four hours daily, Ball took things to the extreme, lying down only for eight hours each night and remaining upright the rest of the time, The New York Times reported. The Rules: Upright all day, sleep at nightBall, 34, set strict parameters...