Exercise bands are made that are designed to
improve strength and flexibility latext. In improving
the functional capacity of individuals who exercise in
the rehabilitation of injuries based on a scientific basis,
chronic patients, or be used to enhance the performance
of athletes. Hardness varies according to color.
Yellow / Soft. Red / Medium. Green / Hard. Blue /
Extra Hard. Black / Ad Hoc Hard. Grey / Super Hard.
During training or exercise.