Any sort of sit up that works the abs, look up good abdominal exercises. CARDIO WILL NOT WORK
Stomach crunches are the core of all stomach exercises. They are considered as basic abdominal exercises. You can do it at home, without any devices.
The abdominal wheel has gotten good reviews. Here is an example: http://ezinearticles.com/?Is-the-Abdominal-Wheel-the-Most-Important-Piece-of-Exercise-Equipment-Ever?&id=1917654 There are also many stomach/ab exercises that require no equipment at all that you can do at home.
A simple one you you can do at home is push ups!
There are lots of exercises you can do at home! Running around your neighborhood or on a treadmill, lifting hand weights, doing yoga exercises, dancing to music, or riding a bike (stationary or non stationary) are good ways of getting exercise at home.
Some good exercises that one can do at home include sit ups, squat thrusts, push ups, chair dips, and wall sits. To find exercise tutorials one can go to acefitness.com or workoutbox.com.
ChooseFitness.com is a blog that will help you with home exercises to keep you fit.
Avoid foods that cause stomach bloating. You can use peppermint tea as a remedy.
Exercising at home is easy and affordable. Simple exercises such as doing squats and push-ups in the living room can help. Using the lower stairs, you can step up and down, working on the leg muscles. Even a simple dance cardio can be done with good music.
Typically speaking, the best ab exercises are those that don't specifically target the stomach like crunches, but the core region. Three that come to mind are opposite arm and leg raises, the prone plank, and squat thrusts with a twist.
There are a number of different exercises that are suited for a home workout. Some of the popular at home exercises are push-ups, sit-ups, leg raises, crunches and squat jumps. One can find a more complete list of exercises on the Ace Fitness website.
ummm.. ok then
There are many indoor exercises that your grandmother can do. She can turn on a workout video and do the parts that are physically okay for her. Also, just a little walk around the house is great exercise for her.