Reapose of salivary IgA and cortisol to reduction of body carbohydrate after paddlivig interval exercise in men Kayakers

The Aim of present study was to investigate response of salivary IgA and cortisol to reduction body''s carbohydrate reserves following paddling interval exercise in men kayakers. Subjects included 10 men elite kayakers، with a mean age of 18. 6±4. years، height 179. 2±4. 07 and weight 68. 3±9. 6 kg، that participated in two separate session within 7 days in two tests and were evaluated. At first، when the glycogen levels were normal، they performed interval exercise protocol، including 3 time padlling for 1000 meters with 90% maximum heart rate intensity and the rest interval 1. 5 fold of padlling time، then the day before main test، to reduce body carbohydrates reserves، they performed a test of padlling with 80% maximum heart rate and rate intensity for 60 minutes and a test including 4 times padlling for 250 meters wihe 90% maximum heart rate intensity and 1. 5 fold rest interval were followed. Then، subject’s nutritional status was controlled and they were asked to stay fast overnight. In the morning، after 12 hours fasting، the interval exercise protocol was performed. Saliva samples were collected before، immediately and 3 hours after exercise. were used Analysis of variance with repeated measures and Bonferroni post hoc test to locate differences and the independent t-test to compare the differences in normal and reduction body''s carbohydrate reserves conditions. One bout of paddling interval exercise significantly reduced salivary IgA and increased cortisol levels (P<0. 05)، in normal and reduction body''s carbohydrate reserves conditions. Nevertheless، was observed no significant difference between IgA and cortisol responses under these two conditions. It seems that one bout interval exercise causes decrease in salivary IgA and increase in cortisol levels، in normal and reduction body''s carbohydrate reserves conditions، of elite kayakers.