Core exercises

Core in this catalog is the rectus abdominis and the obliques — the muscles that flex, rotate, and brace the trunk. Crunches and sit-up variations shorten the rectus; hanging raises load it with a longer lever; rollouts and planks train it as a stabilizer. Oblique work includes side bends, chops, and anti-rotation holds. Spinal erectors live on the back hub, not here, so a back extension does not pollute an abs search. Hip flexors may assist a raise; the card still names the target the catalog stored. People search “core exercises” when they want midsection work they can do with a floor, a bar, or a cable. The atlas lists those movements with equipment and similar exercises. It does not sell a 30-day abs challenge or a medical claim about the spine.