While I was on a recent vacation, I walked down the beach. I decided to get the hard sand workout, meaning the sand that actually is as deep as the water goes in, the water goes out, the sand gets mushy and you get a better workout. I walked a couple of miles in the sun and...
Beach, T.A.C.; Parkinson, R.J.; Stothart, J.P.; Callaghan, J.P. Effects of prolonged sitting on the passive flexion stiffness of the in vivo lumbar spine. Spine J. 2005, 5, 145–154. [CrossRef] 6. Amorim, A.B.; Levy, G.M.; Pérez-Riquelme, F.; Simic, M.; Pappas, E...