Spin classes are high-energy group workouts that focus on indoor cycling. Participants ride stationary bikes while following an instructor who leads them through various routines, often set to upbeat music. The classes typically include different cycling techniques, such as sprints and climbs, to provide a full-body workout and improve cardiovascular fitness. These classes are suitable for all fitness levels, as participants can adjust the resistance on their bikes to match their abilities. Spin classes are popular in gyms and fitness studios, and they often foster a sense of community among participants, making exercise more enjoyable and motivating.