HI Isabel,
If you are looking for certain Pilates moves, try the Roll Up and the Hundreds (both can be found on the Pilates Guides page:
http://pilates.isport.com/pilates-guides/). Of course, nothing can substitute for a healthier lifestyle. Being active and eating well will ultimately be one of the greatest factors in your health. If you're interested, check out the Fitness Guide page. There are quite a few that might interest you. (
http://fitness.isport.com/fitness-guides/). I hope this helps!