When most people think of the core muscles, they think of the abs and lower back, but any muscle that attaches to the pelvis could be considered a core muscle.
 
Visit ab-core-and-stomach-exercises.com to learn core workout tips.

Did you know that you can easily turn arm exercsies and leg exercises into core exercises?
You can use a simple upper body core training stability progression to turn arm exercises into core exercises.
And you can use a simple lower body core training stability progression to turn leg exercises into core exercises.

Recently, I added some new stomach exercises to my website. 
Stomach Exercise #1: Marching on a Stability Ball
Stomach Exercise #2: Reverse Crunches on a Stability Ball
Stomach Exercise #3: Dead Bug on a Stability Ball

If you're looking for a challenging lower ab exercise, try 1 leg piques with a stability ball.
The stability ball is a great tool for core training and abdominal exercises.
Because the stability ball is unstable it will challenge your core muscles to a greater degree and increase your stability.
Learn all the best abdominal exercises.

There are many different types of lower ab exercises you can do with a stability ball.  1 leg roll-ins are a great lower abdominal muscle exercise.
 
Visit ab-core-and-stomach-exercises.com to learn lower ab workout tips and learn over 100 abdominal exercises.
 

The bosu ball is a great tool to increase the muscle work in your abdominals during abdominal exercises.
Because the bosu ball is unstable, your abdominals will work much harder to stabilize your body.
Try doing flutter kicks while sitting on a bosu ball during your next workout, and your abdominals will definitely feel the burn.

If you're looking for some tough abdominal exercises try using 2 bosu balls during your next abdominal workout.
If you've tried the plank on the floor, you can make the plank much harder by placing your elbows or feet on a bosu ball. And if you really want to challenge your abdominal muscles , you can place both your hands and your feet on a bosu ball when you're doing planks.

If you want to learn all the best abdominal exercises, check out ab-core-and-stomach-exercises.com.  It has pictures and instructions for more than 100 abdominal exercises, as well as tips to lose weight and get a flat stomach.

I don't know about you, but I tend to get really motivated anytime I see someone with killer abs.
I stay pretty lean as it is, but when I see someone with ripped abs, I think to myself, "maybe I should take it up to another level".
 
Check out my site to see pictures of men and women with great abs.

There is a difference between core strength and core stability. 
Core strength is best achieved when you move through the entire range of motion at the spine, and core stability is best achieved when you do isometric exercises that require little to no moevment in the spine and pelvis.