So, so many of us skip ab exercises. Especially as we get older. Because they seem to get more difficult rather than getting easier. But abandoning our core leads to far greater mobility and balance problems down the road. Review this link for a brief discussion on the importance of building our core and some valuable tips on how to do so.
Many opportunities exist to get the required physical activity we need for healthful living. Gym, exercise machines, and weights are not necessary. It is all about movement. Just move. PLEASE CONSULT YOUR DOCTOR BEFORE STARTING ANY EXERCISE PROGRAM.