An estimated 70% of boxers in the Phnom Penh circuit come from the rural northwest. The provinces of Battambang and Banteay Meanchey produce a steady supply of boxers. Some of the best Pradal Serey champions come from the Battambang Province although a number of big name stars have come via Southern Cambodia such as Eh Phoutong from Koh Kong Province, Thun Sophea from Svay Rieng Province and Meas Chantha and Seng Makara from Kandal Province. Cambodian boxers train in a gym under a Pradal Serey kru. Many boxers train 6–8 hours a day and 7 days a week.