I was one of the first people my good friend Kenneth ever sold a Kettlebell to in Denmark, must have been 15-20 years ago, back when Kenneth Trained elite swimmers and held RKC workshops.
Back then we both trained elite athletes (I have been out of that game for 10+ years, and embarished to say I haven’t trained myself for 7 years) for about a decade we had weekly debates about training.
In 2021 I want to get into better shape (my shape had become horrible), so what would be more natural than to start with Kenneth’s book.
This book is the best on cardiovascular training there is, but it’s a tiny bit to cardiovascular biased for my taste personally... it’s still an absolute must read for any cardiovascular athlete though.