The Two-To-One Ankle Rockboard (NORMALLY $45. ON SALE NOW FOR $30!)
In the US alone, 23,000 people sprain their ankle each day, resulting in 1.6 million doctor office visits annually.
Because the typical foot tilts in twice as far as it tilts out, to be effective, an ankle rock board should tilt with a two-to-one movement ratio. The two-to-one movement ratio places your foot in the position of a future sprain and then forces you to use your muscles to pull yourself out of the risky position.
You’ll immediately feel that it more effectively exercises the muscles of your lower leg (particularly with the advanced drill) and works to maintain a full range of ankle motion.