| Summary: | 碩士 === 臺北巿立體育學院 === 運動科學研究所 === 94 === The purpose of this study was to examine the effect of the150 km cycle road race on blood cell counts and serum electrolyte concentrations. 12 volunteers were practiced in this study (age: 21.4 ± 8.19yrs, high: 170.5 ± 5.63 cm, weight: 62.0 ± 6.42kg). Blood samples were obtained before, immediately after the race and 24 hours after the race. Haematocrit and haemoglobin concentration did not significant change before and after race (p> .05), however leukocytes volume was significant increase by 57.78%. Serum calcium and sodium concentrations showed decrease significantly, but the response was recovery to normal range after 24hours. Serum lactate acid and creatine kinase concentration increased (p < .05). After one day rest, lactate acid was down to baseline, but creatine kinase still higher then baseline. In the 12 male athletes studied serially for 24 h after the race, the major changes involved increase in mean serum electrolyte, it means 150 km cycle road race might induce electrolyte unbalanced and impaired the exercise performance. However plasma volume immediately and 24 hours compared with the pre-race value, there were not progressive and significant change in MCH and MCHC probably indicating water supplement during racing might prevent the body fluid loss. The decreasing of blood glucose showed even athletes ingested water or sports drink, it seems necessary for athletes to eat more carbohydrate to maintain energies need during endurance race.
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