Great Abdominal Exercise
by Terrence Wilke

Just thought you might want to consider an easier way I found to build
abs. I am 55 years old, and have better abs than most in their 20's.
I am an ex-marine, and when in the service over 30 years ago, I was
surprised at how many large-bellied older marines could do lots of
sit-ups, but - well it was obvious those sit-ups weren't doing them
much good. We were often required to aim to complete 80 bent-knee
sit-ups in two minutes. I always met that requirement, but my abs
never were noticeable at all either. Fast forward to 2010.

Here is what has worked wonders for me: Great Abdominal Exercise