While the book has not been updated in a while, How To, When To, Why To: A Norwegian Model Training Guide & Programs for Cross-Country Skiers provides a great baseline for setting up a long-term training plan for cross-country skiing. From juniors to elite skiers, the fundamentals presented in this book apply equally and will put anyone in a good place to compete at a high level. Intensity and strength training have changed over the years, but this book still provides great groundwork for skiers trying to optimize their training and focus on what matters most.