Twisted: Tackling pelvic asymmetry in bike fitting Humans are designed asymmetrically. Specifically, more than 90% of both males and females present with a forward rotated right side of their pelvis and a backward rotation of their left pelvis. The (possible) causes Many theories have been posed. One theory suggests that the twist starts in the human embryonic stage of development when the placement of our vital organs commences.  The heart, stomach, spleen and pancreas all lay towards the [...]