Salivery secretory IgA levels were studied in non-athletes and athletes in their 20 s.
　The former subjects were 5 non-athletes, who were graduated students. They were loaded on 15 minutes running at the target heart rate of 75% of Vo₂max Whole saliva was collected just before and after (immediately after, 12 hours, 24 hours, 48 hours) running.
　The latter subjects were 6 athletes, who were members of cross-country ski Team of Nihon University. Whole saliva was collected on the day before and at the end of the training camp for three days. Furthermore at the start of and 3 hours after special long distance running which performed at approximately 1,300 merters above the sea level on the third day of the training camp.
　Salivery IgA value in one of the former samples that was collected just immediately after running decresed. The others increased then, and there were the cases that decresed once and increased again after 48 hours.
　The latter samples decresed at the last day of the training camp except the one case. There were incresed and decrease cases after running. The increased cases tended to decrease the next day, conversely the decreased cases showed an increasing tendency. When the camp was finished, 5 cases except one decresed more or less than the before. The results of this study may suggest that the secretory IgA will be concerned with the influence of physical exercise intensity besides the individual difference.

DESCENTE SPORTS SCIENCE Vol.13/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE