The term 'Treadmill Alternative' can be summarized as 'ELLIPTICAL' (10 letters). An ELLIPTICAL is a type of exercise machine that provides a low-impact aerobic workout. It is similar to a treadmill, but instead of running on a belt, the user stands on two foot pedals and moves their legs in an ELLIPTICAL motion. Ellipticals are often used for cardiovascular training and can help improve balance, coordination, and overall fitness.