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POPSYamuna footsavers We've been using a tennis ball for doing this -- self-administered massage of the fascia on the bottom of the feet -- but this looks like a more elegant implementation of the same idea. Massaging the fascia on the bottom of the feet can have a surprisingly large effect on increasing one's flexibility. A simple experiment to try: Sit on the floor with your legs extended out flat in front of you and reach forward to touch your toes (a seated forward bend). Notice how far you're able to reach. Now massage the fascia on the bottom of your feet, either with a ball (tennis, racquet, or the like) or by hand. Really knead the soles of your feet. Now do another seated forward bend. How far can you reach now? When I tried this the first time, it increased my stretch by about 2 inches. Fascia are fascinating.