This is easy to do regular physical exercise activity. All you need is your willpower to start working out and avail beneficial effects of exercise.
This exercise could help you maintain your core strength especially on the upper abdominals area.
1. Lie down on the floor. Lift your legs until they are perpendicular with the floor and fully extend your arms above you.
2. Then reach for your toes with your both hands. Hold that position for a second and go back to the starting position.