This content is protected From 14:30 you can see what it is. Getting more and more popular, Jacobs and Mikey García also using the facility. Looks very high tech, but I think stamina and power is 90% of genetics, you can’t really improve after you have reached your limits For example Mayweather, Pacquiao or Golovkin doing old style of training, their gas tank is out of this world. McGregor spent millions on his training camps , still gassing out after 10 minutes
