Hi there pinkNina, Sorry no one has yet replied to you, so here goes.
You do not mention whether you just have a small lower bulge, usually due to fat levels needing to be reduced further, or whether it is post-natal stretch. To get really toned abs, it is more about what you eat than the exercises you do. Everyone has a "six-pack" hiding underneath the upper layers and bodyfat overall has to be reduced to make them visible, however, most people will never see their six-pack no matter what they do.
Your interest is in the lower abs and these are more difficult than the uppers. Most exercises shown rely on leg lifts but as the legs are not joined to the abdomen, they can only have a secondary effect and not a primary effect. If you go to the Shapefit Home page click on exercise guides > abs > lower ab exercises > bent knee ab hip raises, you will see a typical lower ab exercise. This is a good example.
If you do a tough ab workout that includes core muscles (lateral and peripheral assisting muscles) then you will get the best results all round for your abs. Work them alternate days max, or three times weekly in a separate dedicated workout or before other activities.
As for the toughest ones, well the Univ of San Diego carried out laboratory tests using electromyography (which measures muscle stimulation) and had Captains Chair leg raises as the best when using gym equipment, and, bicycle crunches when down on the floor.
On Shapefits ab page, bicycle crunches is partly shown as "elbow to knee oblique crunches" but lacks the leg movement. To do this exercise completely, cycle the legs exactly as if you were riding a bike, while bringing your elbow across to touch the inside of your opposite knee. Go for maximum twisting movement.
Some tough abs can be done using an exercise ball also.
Sample Workout:
* Exercise ball ab pull-ins
* Bicycle crunches
* Plank on side with upper knee and arm raised
* Oblique dumbbell twists - feet off floor
* Plank with dumbbells - rowing with alternate arms
* Standard plank - raising alternate arm and leg
If you require explanation for some of these, either reply to this, or, go to my profile page and email me. All the best
