The Anitresistance Suit employs magnets, perhaps even electromagnets, that are placed on pistons and in cyclinders that are positioned adjacent to the major muscle groups.
When a muscle is flexed, the magnets move through the cyclinder and follow a track which rotates them or the polarity of the piston
head is changed by the circuitry. This allows a flexed muscle to be aided by the pull of opposite magentic forces. When the flexion is complete, and the opposite magnets are attached, the flexion of the opposing muscle group demagnetizes the electromagnets and magnetizes the electromagnets on the other end of the cylinder, which draws the piston in that direction.
The magnets will be powered by static DC generators in parts of the suit that have lots of mobility.
Magnetic Pistons:
[+ -|-----N] bicept flexes, one end of the cyclinder is positive, the other end is neutral, and the piston head is negative.
[N------|+ -] tricept extends.
The above pistons and cylinders would be constructed of quality plastic. The piston head would be a conductive metal, such as an iron core with copper wire wrapped around it. As would the ends of the piston cylinder. The piston rod would be made of plastic and move through a hole drilled in one of the cylinder ends.