Hi Twisty Puzzles fans, Workout Cube is a regular 3x3x3 Rubik's Cubes that has friction plates. These friction plates dampen the rotation of the centers, using a viscous fluid, like Vaseline. The idea for this puzzle came up in a discussion between Ulrich Meffert (the son of ...) and me. Currently, speed-cubing is incomprehensible to watch, as it goes too fast to understand the solution approach used. A commentator could not keep up with the solver to provide commentary. One solution would be to provide commentary on a solving video in slow motion. Another solution would be to slow the solver down. As each turn takes a lot of force and time, the Workout Cube would force the solver to rethink solving algorithms, as now minimal-number-of-moves solution become more important than fast-to-finger-trick moves. Watch the YouTube video. Buy the puzzle at my Shapeways Shop. Read more at the Twisty Puzzles Forum. Check out the photos below. Enjoy! Oskar