Objective-To compare immune function in female rowers and controls in the r
esting state, and then correlate the results with a two month history of up
per respiratory tract infection (URTI). Methods-Subjects included 20 elite
female rowers located at the ARCO Olympic Training Centre in Chula Vista, C
alifornia, and 19 non-athletic female controls. These two groups were compa
red cross sectionally for immune function and infection rates.
Results-Granulocyte/monocyte phagocytosis, oxidative burst activity, and pl
asma cytokine concentrations (interleukin-6, tumour necrosis factor-alpha,
and interleukin-1 receptor antagonist) did not differ significantly between
groups. Phytohaemagglutinin induced lymphocyte proliferative response (adj
usted whole blood method) was significantly higher (31% and 36% for optimal
and suboptimal concentrations respectively) in rowers than in controls. Na
tural killer cell activity was substantially higher (1.6-fold for total lyt
ic units) in the female rowers than in controls. Two month health logs disc
losed 5.2 (1.2) and 3.3 (1.1) days with URTI symptoms for the rowers and co
ntrols respectively (p = 0.268). For all 39 subjects combined, and for the
20 rowers separately, none of the immune parameters correlated significantl
y with number of days with URTI symptoms.
Conclusions-In this cross sectional comparison of elite female rowers and n
onathletes, a group difference was found for natural killer cell activity a
nd phytohaemagglutinin induced proliferative response (whole blood techniqu
e), but not other measures of immune function. The number of days with URTI
symptoms during the spring season did not differ between groups, and varia
tions in blood measures of immunity were unrelated to URTI.