[header] How to flex your back [title] Do abdominal exercises. [step] Abdominal exercises will flex you back each time you roll your body forward or to the side. Include a few abdominal exercises in your regular exercise routine. 
There are lots of different abdominal exercises you can try including : [substeps] Sit ups crunches oblique crunches do bicycle crunches | bicycle crunches] ] [title] Try supermans. [step] Lay down on your stomach with your arms straight out in front of you and your legs straight out behind you.