The aluminum bodies are more flexible than previous humanoids because of a multi-jointed spine and muscles carefully weaved together by motors, mechanical parts, and wire sensors.
This more realistic depiction of humans by robots could be greatly beneficial to humanity in many ways such as testing how a body is affected by accident or trauma, understanding how to best train an athlete, and researching more about the inter-workings of the human body for field like physical therapy and medicine.
If you see Kengoro in the gym, be ready.
He’s a beast.