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❗️Did you know one of the most effective exercises to directly engage your abdominal fibers is the bent-knee sit-up

✅Lie on your back on a mat with knees bent about 90° and hips flexed ~45° so feet are flat and heels near your glutes keep thighs knees and feet aligned
✅Place your hands on your chest or abdomen and maintain this position throughout
✅Start by slightly tucking your neck bringing your chin toward your chest then curl your torso upward so your upper back lifts off the mat keep your feet on the ground
✅Lower your torso slowly under control and extend your neck back to the starting position without lifting your hips or using momentum
✅Perform the movement with full control and a stable lower body to keep constant tension on your abs

✅Exhale as you lift your torso to maximize abdominal contraction
✅Inhale as you return to the starting position and move under control
✅Coordinate your breathing with contraction and relaxation to control intra-abdominal pressure and protect your spine

Source 📚Exercise Technique Manual for Resistance Training
Third Edition
National Strength and Conditioning Association

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