Engineers have revealed a breakthrough device that apparently makes walking faster and more efficient, not to mention easier.

This prototype exoskeleton boot covers just the knee to the ankle and using it saves up to seven percent energy during walking. This could lead to a new generation of wearable robotics that don't require a motor or even a power source to function.

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This one pound device works by using a spring that stores energy and releases it during every step. An unpowered clutch engages a spring in parallel with the Achilles tendon when the foot is on the ground, offloading the calf muscles and making walking easier.

Unfortunately, the device is too bulky to wear under socks or even pants. 

According to lead author Steven Collins from Carnegie Mellon University, the device doesn't really look bad and when you put them on for the first time, it feels a bit different. But after a few minutes, you won't notice them very much.

Collins also said recent studies show people bike less or even walk less if the activity seems hard. When walking becomes easier for them them, people can do it more and burn more calories, especially with these new types of devices.

This hydraulic cast won't only make walking easier and encourage physical activity for everyone. Its use isn't only limited to obese individuals but can also help the disabled walk better.

Exoskeleton devices not only for the legs but also for the hips can be innovated and developed as with the key clutch attached to the exoskeleton.

Collins admits he has no plans to manufacture this product commercially but encourages companies to do so. He says this has been more of an engineering feat where scientists can improve how humans walk without using any motors.

This study was published in the journal, Nature.

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