Plank and pike workout is a good full body exercise for the abdominal muscles. I am not complaining traditional crunches is not good, but to really get the core muscles to work hard, plank and pike is a better choice. Plank and pike is also practiced in Pilates.

Steps:

Start with toes on the stability [...]

Reverse crunch is another workout which strongly challenges your lower abdominal.  It can be tougher than you see, but I recommend you to give it a try.
Steps:

Lie on your back on an exercise mat on the floor. Place your hands on the floor beside you or behind your head for balance.  Otherwise, you can place [...]

Russian Twist is a great abdominal exercise for people who play baseball, hockey and golf. By fully stimulating the obliques which are the ab muscles at the sides, you will build stronger body power you need for faster swing, stronger throw and harder punches. The real reason why this exercise is known as Russian [...]

Plank is a good abdominal workout. Unlike crunches which abs is facing ceiling, in plank, your stomach is facing toward the floor. Plank does not only strengthen the abdominal muscles, it also improves the back and butt too.
Steps:

Face down on the floor and support your body with forearms and knees.
Raise your [...]