' The belts can lead to severe injuries to organs, muscles and spines, especially in violent crashes.
He conducted dozens of studies in his spine biomechanics lab using the cadavers of pigs,repeatedly flexing their spines in a similar way as a person might when doing a sit-up, but formany, many hours at a time.
He conducted dozens of studies in his spine biomechanics lab using the cadavers of pigs, repeatedly flexing their spines in a similar way as a person might when doing a sit-up, but for many, many hours at a time.
For fitness lovers who used to do traditional sit-ups, Dr McGill recommends a modified curl-up that puts less stress on spines than traditional sit-ups.
A huge arthropod that lived 480 million years ago used spines on its head to filter seawater and to trap tiny particles of food.
Although some use noxious sprays or prickly spines to deter their predators, generally the bugs assume the shape of sticks and leaves to avoid drawing attention.
