Here’s how to work your lower abs with no equipment. The key to targeting the lower abs is to use exercises where the bottom half of your body is brought up such as with leg raises. Here’s a great home exercise that does just that, but pay close attention to form. First, lie on your back with your arms straight by your sides and knees bent to 90 degrees. Pre-activate your lower abs by squeezing your glutes and contracting your abs. Your lower back should flatten against the floor as you do this.

The 5 Best Core Workouts to Get Six-Pack Abs | Men’s Health Muscle