Lie on side with lower arm bent at the elbow. Place lower elbow beneath shoulder and place upper hand on hip. Align ankles, hips, shoulders, and head. Push body toward the ceiling, balancing on the edge of your bottom shoe with one foot directly over the other.
http://greatist.com/move/best-bodyweight-exercises-abs
Plank, Elbow, Side. The elbow side plank is an effective exercise for developing the abs, and is performed by holding a plank pose for a prolonged period exercise. The side position really works the oblique abdominal muscles and w more... more...
http://www.workoutbox.com/exercises/core-exercises/
Raised Knee-In. Targets: Lower abdominals. Lie on back, arms along sides, palms down and just under lower back and butt. Press the small of your back against the floor and extend legs outward, with heels about 3 inches above the floor. Keeping lower back against the floor, lift left knee toward chest. Your right leg should remain hovering above the floor.
http://greatist.com/move/best-bodyweight-exercises-abs
Stand holding a pair of dumbbells at your sides. With your arms slightly bent at the elbows, raise the weights up until your arms are parallel to the floor. Rotate your torso as far as possible to one side. Rotate back to the center, and lower your arms. Repeat to the opposite side. That's one rep. Do six.
http://www.menshealth.com/fitness/core-workout-4
If you are not able to hold the sets as long as stated then work your way up. The core is an often overlooked area and there is no machine at the gym that can duplicate performing these exercises at home. Read more Sports Doc for Sports Medicine and Fitness.
http://www.philly.com/philly/blogs/sportsdoc/5-core-strengthening-exercises-to-do-at-home.html
The Stomach Vacuum is an exercise that will stretch and work the core. Perform this after an ab workout. Below you will find a video tutorial and step by step instructions on how to perform the Stomach Vacuum.
http://www.workoutbox.com/exercises/core-exercises/
Squeezing in a fast workout usually means little or no time for your core. But with this challenging core workout regimen, you'll train your torso with every exercise, for a stronger six-pack and a sturdier spine. And for more great ways scuplt a rock-hard 6-pack, pick up a copy of The Abs Diet Cookbook today!
http://www.menshealth.com/fitness/core-workout-4
WorkoutBOX contains the best core and stomach exercises that are designed to build your strong defined core muscles while also strengthening other parts of your body. Add these core exercises into your weekly routine and soon you’ll start to reap the benefits! Looking for the best core and stomach exercises to get a flat defined six pack? It’s a fact, everyone has dreamed of having a rock hard core section, but few are doing the right core and stability exercises to get one.
http://www.workoutbox.com/exercises/core-exercises/
Enter a simpler (and much more sane) way to tone and strengthen your stomach: bodyweight exercises. After all, your abs exist for more reasons than looking good at the beach.
http://greatist.com/move/best-bodyweight-exercises-abs
Try the 12-minute workout (at the bottom of the page) to train your upper and lower abs and obliques, and work on deep core strength, or mix and match any of the exercises in the gym or at home.
http://greatist.com/move/best-bodyweight-exercises-abs
what are the exercises for the core
The elbow side plank is the exercise for the core. The elbow side plank is an effective exercise for developing the abs, and is performed by holding a plank pose for a prolonged period exercise.