Building a solid core is a great way to improve your abdominal muscles and overall body strength. However, the legs are a key component to your strong midsection.
Try adding a braced squat to your core workout. Stand with your feet shoulder width apart. Hold an appropriately weighted plate in front of your body by extending your arms, keeping your hands at the 3 and 9 position on the weight. Keeping the arms straight, slowly lower your body as much as possible into a squat. When performing a squat exercise, always remember to keep the back straight and well-supported. Hold the squat position for four seconds and return to the start position. Try two sets of 10-12 reps with a minute of rest in between.