So, if you want to have a strong abdomen and back, then do the following tips from a chiropractor:

1. Instead of pulling or sucking your bellybutton to your spine for strengthening your abdomen, simply tighten your abdomen and you will also make your back stronger rather than weaker when pulling in..

2. In the beginning, do this lying on your back, one knee bent to 90 degrees with your interlocked open hands behind your back.

3. Slowly tighten and slowly release your abdomen for 3-5 seconds so as to have productive amount of time under tension.