Jeffries training program seems very tough. I found this on the net. Jeffries' preparation for his title winning effort over Fitzsimmons. "For this fight he ran some 14 miles in the morning, alternating between a jog and a 100-yard sprint, without stopping to walk or rest and finishing the run within two hours. In the afternoon, he played three games of handball, punched the bag for 20 or 25 minutes straight, and skipped rope 1,500 to 2,500 times. He would then box from 12 to 16 rounds, and 'wrestle around' or toss an 18-pound medicine ball."
Jeffries has amazing stamina. Very rare he could fight 25 rounds hard in a non air-conditioned arena or outdoors. He also had a 300-pound heavy bag to train with...full of sand.
