Hello I am quite a physics noob and the following is something I wouldn't bet on but is more of physcis concept practice. But if it works, great! Specific questions/problems that I would like an answer to will be denoted by a number and the blue twirling smiley(:rofl:), for your convenience. And grey font is stuff unnecessary for you to get the basic idea. I am a daily runner and often times imagine running being more engaging/fun. I was wondering if there was a way to substantially increase stride length and/or height achieved while running (Moon Shoes -- pffft! what a rip off:grumpy:), without substantially increasing the level of fatigue induced. So, i came up with a hydraulic-eddy current device. (I uploaded a pic, should be somewheres) Basically, the force of your body weight and running when your foot comes down powers one end of a hydraulic pump, the other end volleying a strong NdFeB magnet into a copper section of a pipe (btw -- i do have a basic understanding oif the relationship btwn hydraulic machine's surface areas and force translation). The pipe is strapped onto your back. The eddy current reaction will stop the magnet, resulting in a force on the pipe, and thus you, upward. (If you contest to the short time a force will be induced, if the idea works, i intend to stretch the time the force is present by putting gaps in the copper at the bottom of the section progessively making it into a solid pipe at the top of the section, balancing the velocity of the magnet and the total resistance of the pipe so that a constant force is present for a longer duration.) If the volleying action (will the magnet's release cause a force back onto the hydraulic machine and counteract any effect of eddy currents?1:rofl:) is not workable then an alternative is to keep the magnet on the surface of the piston, so no volleying is done, and the piston just runs through the length of the copper section. I know there are other technicalities like how will the piston re-set for the next step (and i do have ideas), but i just want to see if the basic idea works. Are there any counteracting/balancing forces that will inhibit a net force (albeit periodic)? 2:rofl: Will the hydraulic fluid flow fast enough to accelerate the magnet?3:rofl: Thanks for your time.