A new wearable robotic device is boosting the strength of children with spinal muscular atrophy, according to research published in Nature. SMA causes spinal motor neurons to die, and while genetic treatments can slow the disease, they can’t help with muscle loss. After a six-week trial with the knee robot, the six participants, ages 6 to 10, had bigger quadriceps and improved conductivity in their nerves, and could stand from a lower sitting angle.