What are some good abdominal exercises that don't need machines?

Flutter kicks, Bicycles, Crunches, Sit ups, use the ball thing too

there is not any 'maximum acceptable device' any device that would want to provide you with the abdomical exercising consultation you want is ideal for you... operating example, i come across i am going to purpose my higher abs maximum acceptable with the help of a device and reduce abs maximum acceptable and not using a device utilizing a weightplate my chum does the finished opposite and we both have tremendous abs.. so there is not any maximum acceptable.. do what works for u

Best physical exercise: Pilates earns my #1 recommendation here for being the absolute best form of physical exercise regardless of your age or physical condition. Originally created by a man, Pilates is far more popular with women these days, but men need this training more than ever. Talk about an ab workout!

I have try the following method and it works:

Postural Guidelines Abdominal

1. Make sure your head is horizontal to the ground and centered over your shoulders.
2. Bring your chest up.
3. As you bring your chest up, your shoulders must relax and not go up. Therefore, relax your shoulders down and back.
4. Tighten your abs by pulling your belly button to your spine.
5. Align your knees with your second and third toes.
6. Make sure your knees are not locked. There must always be a slight bend in them.
7. Lay with your feet spaced comfortably apart (usually hip width).

Try doing sit ups on an excersize ball.