I don't have very much about fitness and what is efficient or not. Is this program constructed well enough to produce good results in your opinion?
Thank you for your insight.
If your goal is to have strong, defined abs that plan will do nothing for you. Worst of all the volume of situps it involves could be dangerous.
Getting abs is a tough process that requires two things:
As for the exercises you should do, people will suggest that deadlifts and squats are already working your core quite a lot, and to a certain extent they will be correct. However, like anything else in life, if you want great results you need more effort.
To get some great abs, once your body fat is low enough, throw some of these into your routine:
As a bonus extra, on chest day at the end throw in some push-ups. At the top of the movement, focusi on retracting your scapula by pulling your shoulders together at the front. This will help work your Serratus Anterior (the small muscles that look like fingers hugging your ribs). These aren't worked out as effectively as they could be during bench presses as the bench helps brace the scapula, reducing their requirement to work.