Extreme flexibility can be an asset, but in some people it can be a liability. Lintao Zhang/Staff via Getty Images SportConnective tissue is found throughout the human body, within and between structures as varied as muscles, nerves and internal organs. Like an elaborate web, it holds everything together – providing the body shape and promoting proper movement. Many people, especially young women, have very flexible connective tissue. While flexibility is essential for childbirth – and an advant