Hard Knocks is a documentary television series produced by HBO that follows a professional football team during its training camp and preseason. The show provides an inside look at the players, coaches, and staff as they prepare for the upcoming NFL season. Each season focuses on a different team, showcasing the challenges and dynamics of team building. The series debuted in 2001 and has become popular for its candid portrayal of the sport. It highlights the personal stories of players, including rookies trying to make the team and veterans facing career uncertainties, offering fans a unique perspective on NFL life.