Ben Hogan's golf swing fundamentals emphasized the importance of engaging the core muscles to achieve an efficient and powerful swing. He believed that a strong and stable core was essential for a consistent swing and that golfers should use their core muscles to generate power and accuracy. Hogan's swing technique involved keeping the arms and club close to the body during the backswing and downswing, while rotating the upper body around a stable core. This allowed for a more efficient transfer of energy from the body to the clubhead, resulting in a powerful and consistent swing. Overall, Hogan's golf swing fundamentals emphasized the importance of a core-connected golf swing to achieve maximum power, accuracy, and consistency.