No, abdominal exercises are not the holy grail for a flat stomach, but it is good to train them. In this way strong abdominal muscles can relieve your back.
1. Tighten your abs
In everyday situations, try to contract your abs as often as possible; while you sit, walk, work. It's not a very effective exercise, but you can do it anywhere. You learn to have and keep control of your abdominal muscles and that helps with other exercises.
2. Add weights to your abs For example, hold a weight against your chest with two arms. The extra weight makes your abs work extra hard. Ask the gym for tips for good abdominal exercises with weights.
3. Take it slow!
Quick abdominal exercises do not always mean that you are more effective. Make your movements slow and controlled. You will feel that it is heavy.
