A common staple in science fiction is the idea that we can augment humans by replacing limbs with mechanical substitutions that enable superhuman feats - weightlifter like strength in a slender incognito package, invisibility, Bruce Lee speed reflexes, etc. None of this is implausible at all since we currently make prosthetic implants, and it's only a matter of time until the technology and power of these prosthesis exceeds the capabilities of their natural parts.
Most implants that exist today require relatively little power since their capabilities are very limited. But when it comes to a cyber arm that can punch through walls, the need for more energy (of any type) will be higher.
Assuming that an augmented person has 2 cyber arms and 2 cyber legs that enables him to jump a 6 feet (1.8 m) wall easily without using his hands. He can also lift and carry a 650lb (300 kg) vending machine with his arms. How much higher would his short term and long term energy needs be?
Is the human body capable of covering these energy deficits by regular biological methods (burning fats, consuming carbohydrates and sugars, ATP production, etc.) and increased food intake?
Are there scientifically viable methods of inserting a power supply into a human that would …
provide enough energy to power these augments if the body isn't capable of doing so normally
or reduce the need for increased food consumption?