The fantasy is an experience, but the residual effects remain real. You become abducted by aliens, evaporating your human body from wherever you are, and transported to the mothership in another galaxy, where the aliens augment their experimental human with a new hardware upgrade: Supernaturally powered muscle fibres. This is advanced technology that makes your muscles bigger, harder, and stronger.
Feel yourself melt and evaporate, being transported through space-time onto that mystical operating table that you know and love.
Feel as they open up your body parts, one by one, making each little bit drift away as each part of you becomes developed.
Waking up, you feel these new permanent robotic super-connectors between your bones, like robotic joints. Your muscles feel a new toughness with the perfect elasticity for optimum performance. They also feel larger and slightly more fibrous.
This is a great fantasy, though it will cause actual physical effects
Effects: Muscle strength, Muscle size, Joint/Sinew strength
Works well with Alien Cyborg