It is amazing. think about it, pick a Sunday, and call it a training day. If you get on your four, on your yoga mat at home, and do this grinding sliding motion, for 20 min, then do a head up and down motion for 10 min, rest on your back for 10 min and again get on your four for 10 min. stand up, do some house cleaning, for another 10 min, which makes it an hour, and repeat 10 times
Next time you visit a girl late a night and was about to say she isn't having enough energy you will recall that "training day".