No gym needed? Scientists in China develop self-exercising muscle grafts

Scientists in China have created a self-exercising muscle graft that might allow bedridden people to gain the benefits of working out without any physical exertion. With just an injection of muscle cells below the skin, the cells self-assembled into muscle grafts, which not only improved whole-body muscle mass in mice but also led to improvements in bone density, endurance, liver function and cogn