I’ve heard that running on the beach is good for you – what, with the surf and all – but HydroCo’s Physio treadmill takes the idea to all new levels. A separate ballast tanks holds the H2O and within minutes the pool cum treadmill can be filled with up to 51 inches of water. I can’t imagine running in need deep water, but in case you’ve got a penchant for torture the 4 treadmills can each reach a max speed of 9.3mph. But it don’t stop there. Additional resistance can be added by using the built-in Hydro-jets. I’ve got not clue what this thing costs but it’s gotta be crazy expensive.