It is sometimes difficult to concentrate on a workout when the instructor is taking it so seriously. While I realize working out is a serious thing... adding light-heartedness, ease, cheer, and plain enjoyment can really change your whole outlook on what you are actually doing. I completed this workout and felt so great... Actually, I felt as if perhaps I really didn't workout enough because I really enjoyed Donna's style. The next day, my body truly felt it. WOW! I love to workout and thought that I wouldn't feel it... But I did. You go GIRL!!