The term "recumbent" refers to a position of lying down or resting. It is often used to describe a posture where a person or animal is reclining, typically with their back supported and their body horizontal. This position is common in various contexts, such as during sleep or relaxation. In the context of fitness, a recumbent bike is a type of stationary bicycle designed for users to sit in a reclined position. This design provides back support and can be more comfortable for individuals with mobility issues or those recovering from injuries, making exercise more accessible.