The hanging leg raise is one of the toughest ab exercises — hanging from a bar, you lift your legs to train the lower abs and hip flexors through a big range.
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Get FormTwin — free on the App StoreThey work the abs (especially the lower portion) and obliques, with the hip flexors driving the leg lift and the forearms and shoulders holding you on the bar.
Yes — curling the pelvis up at the top of each rep, rather than just lifting the legs, is what recruits the lower abs. Without that pelvic tilt it becomes mostly a hip-flexor exercise.
Brace your core before you start, keep your shoulders active, and lower slowly. If you still swing, do knee raises or use a captain's chair until your control improves.
This guide is general fitness information, not medical advice. Muscle involvement varies with form, grip and individual anatomy. Consult a professional before starting a new program.