Want to tone up your tummy?
Here's a quick and convenient way to flatten your stomach
1. Lie on the floor with your legs bent, your feet flat on the floor. (Cheat's option: with your legs bent at a 90-degree angle, place the soles of your feet up against a wall. This will make it a little easier.)
2. Place your hands on the back of your head, or cross them over your chest like an Egyptian mummy.
3. Lift your shoulderblades off the ground, moving your elbows towards your knees. Don't try to lift your entire back – only your shoulderblades.
4. Squeeze your abs for a second (think about squeezing a lemon).
5. Slowly return to the starting position. Remember to breathe out when raising your body up, and breathe in on the way down.
TIP Make sure your movements are slow and controlled - resist the temptation to rock yourself back and forward just to “try to get a few more out”. It's better to do your crunches with good form than a lot of crunches with bad form.
source: Readers Digest