With half-linked arms and pedals, user can perform upper and lower body synchronism or independent movements. It will strengthen the core muscle groups and enhance exercise durability. Patent independent system: each independent arm has accommodated three movement pattern including unilateral arms move independently to create single or dual-arm exercises for upper, lower or total body training. Low step-through design is the safety design for elderly and wheelchair user. Removable seats for wheel-chair access to meet the specific needs of wheelchair users. Fully adjustable seat provide limitless combination to ensure a comfortable stepping position.