The purpose of this study was to examine the changes of blood ammonia and lactate following VO(_2)max test and three absolute exercise intensities and to testify role as fatigue varibles in exercise performance. All of the test were perfbrmed on the treadmill. Subjects of present study were divided ...
The purpose of this study was to examine the changes of blood ammonia and lactate following VO(_2)max test and three absolute exercise intensities and to testify role as fatigue varibles in exercise performance. All of the test were perfbrmed on the treadmill. Subjects of present study were divided into trained(T) group who were university rugby player and untrained group(UT) who were university student. All subjects participated in VO(_2)max test and three times of 30 min absolute exercise intensity; absolute exercise intensity I (treadmill speed was 4.5 mph, grade 7%; AEI I ), absolute exercise intensity II (treadmill speed was 5.0 mph, grade 7%; AEI II), absolute exercise intensity III(treadmill speed was 5.5 mph, grade 7%', AEI III). In VO(_2)max test, mean blood lactate concentration at the end of exercise was 19.4 mmol/L in T group and 16.1 mmol/L in UT group. There was significant mean lactate concentration differences between T and UT groups(p0.05). In absolute exercise test, T group mean blood lactate concentration after 30 minute were 1.46 mmol/L(AEI I ), 3.26 mml/L(AEI II), 3.34 mmol/L(AEI III), and UT group mean blood lactate concentration at the same time were 7.76 mmol/L(AEI I), 8.08 mmol/L(AEI II), 15.44 mmol/L(AEI nI), respectively. Thus, mean blood lactate concentration of UT group was higher than that of T group, and there was significant mean blood lactate concentration differences between T and UT groups, and there were also significant mean blood lactate concentration difference among the absolute exercise intensities, too(p<0.05). In absolute exercise test, T group mean blood ammonia concentration after 30 minute were 143.7 μmol/L(AEI I), 178.5 μmol/L(AEI II), 206.6 μmol/L(AEII II), and UT group mean blood lactate concentration at the same time were 201.2 μmol/U(AEI I), 225.1 μmol/L(AEI II), 240.5 μmol/L(AEI III), respectively. Thus, mean blood ammonia concentration in UT group was higher than that of T group, and there was significant mean blood ammonia concentration differences between T and UT groups, and there were significant mean blood ammonia concentration differences among the absolute exercise intensities, too(p0.05). In absolute exercise test, T group mean rectal temperature after 30 minute were 38.36℃ (AEI I), 38.28℃ (AEI II), 38.34℃ (AEI III), and UT group mean rectal temperature at the same time were 38.84℃ (AEI I), 39.20℃ (AEI II), 39.40℃ (AEI III), respectively. Thus, mean rectal temperature of UT group was higher than that of T group. There was significant mean rectal temperature differences between T and UT groups(p0.05). Therefore, blood lactate changes showed high validity as a fatigue elements and rectal temperature elevation might possibly be a good indicator of fatigue progress. However, because of big individual differences in ammonia concentration at same absolute exercise intensity, blood ammonia changes showed low validity as a fatigue elements in this study.
The purpose of this study was to examine the changes of blood ammonia and lactate following VO(_2)max test and three absolute exercise intensities and to testify role as fatigue varibles in exercise performance. All of the test were perfbrmed on the treadmill. Subjects of present study were divided into trained(T) group who were university rugby player and untrained group(UT) who were university student. All subjects participated in VO(_2)max test and three times of 30 min absolute exercise intensity; absolute exercise intensity I (treadmill speed was 4.5 mph, grade 7%; AEI I ), absolute exercise intensity II (treadmill speed was 5.0 mph, grade 7%; AEI II), absolute exercise intensity III(treadmill speed was 5.5 mph, grade 7%', AEI III). In VO(_2)max test, mean blood lactate concentration at the end of exercise was 19.4 mmol/L in T group and 16.1 mmol/L in UT group. There was significant mean lactate concentration differences between T and UT groups(p0.05). In absolute exercise test, T group mean blood lactate concentration after 30 minute were 1.46 mmol/L(AEI I ), 3.26 mml/L(AEI II), 3.34 mmol/L(AEI III), and UT group mean blood lactate concentration at the same time were 7.76 mmol/L(AEI I), 8.08 mmol/L(AEI II), 15.44 mmol/L(AEI nI), respectively. Thus, mean blood lactate concentration of UT group was higher than that of T group, and there was significant mean blood lactate concentration differences between T and UT groups, and there were also significant mean blood lactate concentration difference among the absolute exercise intensities, too(p<0.05). In absolute exercise test, T group mean blood ammonia concentration after 30 minute were 143.7 μmol/L(AEI I), 178.5 μmol/L(AEI II), 206.6 μmol/L(AEII II), and UT group mean blood lactate concentration at the same time were 201.2 μmol/U(AEI I), 225.1 μmol/L(AEI II), 240.5 μmol/L(AEI III), respectively. Thus, mean blood ammonia concentration in UT group was higher than that of T group, and there was significant mean blood ammonia concentration differences between T and UT groups, and there were significant mean blood ammonia concentration differences among the absolute exercise intensities, too(p0.05). In absolute exercise test, T group mean rectal temperature after 30 minute were 38.36℃ (AEI I), 38.28℃ (AEI II), 38.34℃ (AEI III), and UT group mean rectal temperature at the same time were 38.84℃ (AEI I), 39.20℃ (AEI II), 39.40℃ (AEI III), respectively. Thus, mean rectal temperature of UT group was higher than that of T group. There was significant mean rectal temperature differences between T and UT groups(p0.05). Therefore, blood lactate changes showed high validity as a fatigue elements and rectal temperature elevation might possibly be a good indicator of fatigue progress. However, because of big individual differences in ammonia concentration at same absolute exercise intensity, blood ammonia changes showed low validity as a fatigue elements in this study.
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