In addition to my own videos, these are some of the videos that I found really helpful. If you like what you see, I encourage you to subscribe to their YouTube channels and visit these websites. You'll find links under the video after selecting each video.
Planks for the Abs!
This video was a pain to make, literally. In it, I share the glorious pain of doing planks, a great way to strengthen and accentuate your abdominal muscles. I am hoping that it will give you motivation, or at the very least, provide you with a few laughs.