BACKGROUND: there have been substantial researches to show that an increase concentration of hydrogen ions and a decrease in pH (increase in acidity) within muscle or plasma causes fatigue. Perform Cryotherapy, Ice massage, is related the fact that intense exercise actually causes microtrauma. This muscle damage not only stimulates muscle cell activity and helps repair the damage and strengthen the muscle but it is also delayed onset muscle pain and soreness (DOMS). AIM: to investigate the impact of swimming two events (200 meter IM event and 200 meters butterfly) in one session regarding the National swimming competition schedule of Egypt on blood lactate concentration and pH. Also, the impact of Ice massage after each event. METHODS: 20 competitive swimmers (National level) aged 17 ±1.56, weight 75±2.3 and height 177.21) divided into two groups (experimental and control) experimental group perform 2oo meter Individual medley. Five minutes following this maximal effort, an ice massage has performed to the swimmers to their shoulder and legs (3 minutes, 2minutes and 1 minute soft massage and one minute rest interval between each massage) then completed by another 200 meters but butterfly after 30 minutes of the first race. The same ice massage has been performed. Blood sample has been collected to measure both blood lactate concentration and pH pre-race, immediately after and after 30 minutes of each race. Control group performed the same races but without ice massage in between the two races. RESULTS: revealed significant increase (P< 0.01) in blood lactate levels and decreased pH immediately after exercise in both groups, decreased significantly after 30minutes of the first race compared to the control group. DISCUSSION AND CONCLUSION: It is concluded that ice massage may help recovery from short maximal efforts or after perform one race followed by another race in one swimming session within 30 minutes.