This post is really timely for me. I used to exercise myself alot but lately I stopped exercising, not that I deliberately do so but because I think I am too occupied and too busy for that. Now that I have come to know about interval training, I will start working on it. I am already seeing the slow, fast, slow fast method working in my case because I do a lot of walking, to shops, pick kid at school and a whole lot.
I really appreciate you for this post