To injure a (bodily part) by twisting
Flip flops don't hold your foot in place at all, so one wrong step could cost you an ankle thanks to a sprain or other type of injury.
However, being overweight and generally inactive also increases the chance of developing a strain or sprain.
It may be necessary for the child to do exercises to strengthen the joint after a serious sprain.
Sprains: The more recent the sprain occurred, the more risk an insurer will ascribe to the health problem.
Grade II and III sprains are often seen by a physician, who x rays the area to differentiate between a sprain and a fracture.