A mechanical adjustable exoskeleton is disclosed for use by a biped animal with impaired bone and muscle. The exoskeleton has a metallic structure that supports extensible and reducible brackets, patellas between brackets, electric conventional motors of the linear actuator type of 10 and 30 Kg, an insole is provided in the horizontal base back support, and a lower back support. An electric system that composes of a main microprocessor that operates through a communication to all system components. Magnetic sensors of angular and external position, are placed on each patella and include a magnet, a magnetic sensor and a base for the magnet sensor, force sensors on the insoles, and an accelerometer on the back support enable electronic control in real time.