Please help with Aggressive press

Please help a brother. How do I defend like my opponents with aggressive pressing?, I have tried using 45, 71 settings but my players are not aggressive? My defenders take time to start running, same with my attackers, my respond time is so slow. But my opponents in Ultimate have supper response time and out run my top speed players. Some help or point me to a tutorial. Its really frustrating playing opponents whose players run around like robots and never get tired, since I cant beat them, I need to join them.