Double crunch: The reason the double crunch is one of the most effective exercises is because you are activating the entire abdominal area.
TIP: The key is to contract tightly at the top part of the movement.
Lie on the floor with your head facing up. Bend your knees until your legs are at a 45-degree angle, with both feet on the floor. Your back should be comfortably relaxed on the floor. Now place both hands behind your head.
Contracting your abdominals, raise your head and legs off the floor toward one another. Slowly return to the starting position, stopping just short of your shoulders and feet touching the floor.
Bicycle manoeuvre: Research consistently rates this as one of the most effective abdominal exercises, It works your entire ab region.
Lie on a mat with your lower back in a comfortable position. Put your hands on either side of your head by your ears. Bring your knees up to about a 45-degree angle. Slowly go through a bicycle-pedaling motion - alternate your left elbow to your right knee, then your right elbow to your left knee.
WARNING: This can be a more advanced exercise, Do not do this activity if it puts any strain on your lower back .It can disable you for a while, then you cant do any exercise!
