Background: Exercise-induced immunosuppression is a troublesome problem in athletes. This study investigated the effect of precompetitive anxiety on catecholamine and on the role of
catecholamine in the regulation of immune system through the analysis of catecholamine, Immunology index and precompetitive anxiety state.
Methods: This study includes a longitudinal test and a randomized controlled experiment involved eighteen elite women volleyball players in shanghai. In the former, Urinary
catecholamine, Plasma immunoglobulin(IgG, IgM, IgA) , T lymphocyte and subsets(CD3,CD4,CD8) were determined in the adjustment phase of four months of conventional training period each month(T0), four
weeks (T1), one week(T2) before the national women's volleyball championship. At the same time, according to the CSAI-2，scores of cognitive state anxiety（S1），somatic state anxiety（S2）and the state of
self-confidence（S3）were obtained. In the controlled experiment, eighteen volleyball players were randomly divided into control group(G1) and experimental group(G2). In the experimental group, athletes
supplemented the nutritional supplement which could relieve anxiety every day, but the control group did not. The indexes involved in the longitudinal test were all determined in this experiment four
weeks(T3), one week(T4) before the national game.
Results: The first: CD4 in T2 decreased significantly as compared with that in T1, IgA and CD4/CD8 as well. The secpond:In T2, IgA were correlate with S1, S2, adrenaline and dopamine
, and also IgG were correlate with and the latter three indexes. But there were no correlation between IgA and S3, and IgA and arterenol, this is also the case for CD4/CD8 and S3, and CD4/CD8 and
arterenol. The third: There were no significant difference both morning urinary epinephrine and dopamine between G1 and G2 in T3.In G2 urinary epinephrine and dopamine decreased significantly in T4
compared with that in T3, the same was S1 and S2, but S3 didn’t change significantly. In addition, IgA and CD4/CD8 increased significantly in T4 compared with that in T3 in G2, which was just the
opposite in G1.
Conclusions:The first: IgA and CD4/CD8 can be used as a sensitive index to reflect the immune function of women volleyball athletes when they face precompetitive anxiety state. The
second: Antianxiety nutritional supplements can relieve anxiety, regulate secretion of catecholamine, so as to keep the level of the immune function.The last: It is vital significant for regulation of
women volleyball athletes in good condition that catecholamine as a key monitoring indicator to assess their immune function.