This is the Fourier N1: an open source humanoid robot that can run continuously for 2 hours. It has 23 degrees of freedom. This robot stands 1.3m tall, weighing 38kg. It is based on a preset FSA 2.0 actuator and can achieve speeds of 3.5 meters per second. As you can see in the video, the robot can not only run but also play a bit of soccer.
This robot has a reinforced aluminum alloy structure with plastics. The above video shows it in action.
[HT]