BOSU

BOSU (an acronym for Both Sides Up) is a fitness equipment brand best known for its iconic half-ball balance trainer that combines a sturdy platform with an inflatable dome to create an unstable surface for functional strength, balance, mobility, and core training. Originally developed in the late 1990s to help athletes improve stability and performance, BOSU products have become widely used in gyms, rehabilitation centers, and home workouts around the world. The brand also offers a range of complementary fitness tools and accessories designed to enhance balance-based training, making BOSU a staple name in functional fitness and group exercise programming.