US Patent 10307632 Elastic band exercise assembly

An elastic exercise safety cord assembly, having an elastic tubing with first and second ends, an exterior wall, and an elongated cavity having a first diameter. The elastic tubing stretches a first predetermined length. First and second end plugs are secured inside the elongated cavity at the respective first and second ends, with a widest portion of each first and second end plugs closest to its respective first and second ends. A cord has third and fourth ends that is threaded through the elastic tubing and the first and second end plugs. The cord is a second predetermined length that is shorter than the first predetermined length.