In thinking about the incredible stamina mentally and physically, in golf if you win lets say The British Open, one would shoot roughly 70x4 = 280 strokes over 4 days, the IPT players shoot roughly a 70 in each match x 6 which is 350 strokes x 6 rounds = s 2100 shots = s 30 rounds of golf. Then on top of it they have to play in the finals. Its almost like the difference between tennis and badminton. Golfers unless they play two rounds in a day are never in competition for 10 hours each day for 6 days plus a for sure heads up final that can last for another 2 hours. Quite amazing, betcha these guys are going to take a vacation after this event and the others will say its too difficult or will spend way more time at the gym.