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It’s rare to see studies on altitude training (AT) carries out continuously in 2 altitudes. This study followed a 10 weeks swimming training program that included 2 weeks training in DuoBa (2366M) and another 2 weeks in KunMing (1890M). The training characteristics and swimmers’ functional changes were studied in seven swimmers during the training program, just before swimmers participated in the Chinese 12th National Games. Blood samples, heart rates and weights were collected and analyzed for physiological index. Conclusion: (1) The training before plateau was mainly about moderate -high intensity aerobic training. In Duoba, low-moderate and moderate intensity aerobic training was priority. In KunMing, high intensity aerobic and anaerobic training was increased. After the plateau, recovery and conditioning adjustment are the main part. (2) This AT has non-significant effect on athletes’ HR level; the body weight has significant decreased after 3 weeks in plateau and recovered to the common level after a week return to the plain. The athletes’ hemoglobin and blood testosterone increase significantly in plateau. (3) The great results of all seven swimmers in the National Game shows that this pattern of AT is an effective way for improving swimmers’ performance.

Changes in Training Characteristics and Functions for Swimmers during a “DuoBa-KunMing” Altitude Training