I think MJ gets a lot of help from Nike. Obviously they have a partnership.
Also, I did not see Bo Jackson’s facility listed, his place is huge and he also has a partnership with Nike.
Once in a speed camp, the athletes benefit not only from the modern advances in speed training (which are significant), but from the variety of other instructions and experiences they receive throughout the process.
^^ Modern advances in speed training? They must be talking about the one legged dead lifts standing on a bosu ball.