The 'Big Man Stations' are the challenges where you use your Center(C), Power Forward(PF). There are 3 levels to each challenge, you will have to get over 3,000 points to pass the first level, you will have to get over 4,500 points to pass the second level, and you will have to get over 6,000 points to pass the third level.
Go to "Main Menu">"Game Modes">"NBA Live Academy", the select on "Academy Challenges". If you select Academy Practice you will ONLY be practicing the challenges therefore you will not get this achievement.
The following are all 'Big Man Station' challenges:
* Offensive Rebounding
* Defensive Rebounding
* Low Post Offense
* Low Post Defense