Well, I use to have a six pack, a lot of cycling, gravity boot sit-ups,
And just a freak on a bike..
then in my mid to late 20s, I was diagnosed with severe asthma and Docs started stuffing me full of steroids to build my lungs back up
Needless to say, it wasn't to many years after I hit 30 that the Six back was gone, and by 40, a Keg replaced it.. I still ride & walk and plan on getting another gravity board for verticle sit ups, and I also understand what others are saying & the abs will remain in hiding..