No this isn't a mistake or favour for someone. Far from it. As a sufferer of occasional back pain (strain) I received lots of recommendations for this dvd, so I closed the curtains and stuck the dvd on. Andria Baldovin is a cyclist and Yoga teacher who has made this dvd specific to mtb riders with 2 x 1/2hr sessions which she personally guides you through very clearly and effectively even for a total novice (like myself). It really improves your core strength (a buzz word in the fitness world), balance and of course flexibility which all helps considerably with riding performance as well as getting ride of my aches and pains. I just can't recommend it enough and went to all the hassle of getting them back in the UK, from the good ol' U S of A. Oh and one more tip, don't try doing both sessions together - they are a lot more taxing than you imagine!