Bizarre footage of martial artists in China swinging heavy wooden boxes from their private parts in the belief that the practice helps them treat diseases and makes them stronger. <br /><br />The video, filmed in Zhengzhou, Henan Province on April 8, shows the group of "kung-fu" trainees dangling the boxes and swinging them backwards and forwards. <br /><br />This form of kung-fu is reportedly known as Damo Yijin Xisuigong, and does include many less extreme methods of strength and conditioning work.
