Alright there's a company in Japan that called itself Cyberdeyne - which is from this movie - and they developed a product called "Hybrid Assistive Limb" or HAL - which is from another movie. Both of these movies served as warnings about reliance on technology. They must have known this, it can't be a coincidence. Here's a picture of HAL
Using bio-electrical sensors attached to the user's skin it is able to analyze how much power the user intends to generate and then the power units generate torque and assist the user's limbs.
While that's pretty cool, it worries me a tiny bit. Things didn't go too well for the humans in those films.