An ab class, short for abdominal class, focuses on strengthening and toning the muscles of the core, primarily targeting the abdominal muscles. Led by an instructor, participants engage in a series of exercises that may include crunches, planks, leg raises, and other movements designed to work the core muscles. The class aims to improve core stability, enhance posture, and develop a stronger midsection. Ab classes often incorporate variations and progressions to challenge participants at different fitness levels. It's a focused and effective way to work on the muscles that support the spine and contribute to overall body strength and balance.