An Angle Board is an excellent tool for strengthening the calf muscle which protects the ankles. It helps to prevent injuries or to help damaged ankles and ligaments recover from injury. You can use it to strengthen the feet as well as stretch the feet and ligaments which may help alleviate shin splints, calf strains, and plantar fasciitis. This slant board is adjustable to several angles so you can work up to more challenges stretches. It’s made of quality material, designed to last a very long time. I love mine!