What is the best bearing to develop abs without delay minus using any machinery?
Try some sit ups or crunches. I reccomend as a 14 year old boy.. do aerobics such as bicycle crunches, crunches, bench dips, or do push ups. Diet is a big habit too, but that depends on ur age if you are still within the growth stage eat alot so you can grow. dont eat to much of something because it will turn into body large. if u have trouble finding aerobics search it on youtube.com: Home workouts. do your ab workouts for atleast 15-20 minutes a morning. Good luck on your exercising. i am on a exercise routine too. :). REMEMBER! Always
stretch your muscles before attempting these activities!
lose adjectives your belly fat and then do abs and leg raise