Table 2.

Total CD34+ cells and their subpopulations in controls and runners

CD34+ TotalCD34+/ CD38CD34+/ CD38+CD34+/ HLA-DRCD34+/
HLA-DR+
CD34+/ CD33CD34+/ CD33+
Controls
Baseline4.0 ± 2.00.4 ± 0.73.0 ± 1.42.3 ± 1.91.8 ± 1.42.4 ± 2.11.6 ± 1.1
Half-marathon
Baseline23.4 ± 23.3* 0.9 ± 1.122.0 ± 23.3* 7.3 ± 4.0* 14.6 ± 20.1* 4.9 ± 4.718.5 ± 22.5*
End of race17.5 ± 13.11.3 ± 2.115.6 ± 14.810.7 ± 11.56.5 ± 3.312.3 ± 10.84.4 ± 3.2
Morning postrace9.8 ± 6.6 1.2 ± 1.27.9 ± 6.06.2 ± 6.93.9 ± 1.77.1 ± 6.22.7 ± 1.1
Marathon
Baseline15.5 ± 7.6* 0.2 ± 0.613.2 ± 6.4* 10.7 ± 8.2* 4.2 ± 2.89.5 ± 9.76.0 ± 5.8*
End of race18.6 ± 10.51.3 ± 1.614.7 ± 9.710.6 ± 6.15.0 ± 4.614.4 ± 8.84.2 ± 4.1
Morning postrace9.5 ± 3.6 0.5 ± 0.68.1 ± 3.25.4 ± 2.9 3.8 ± 2.27.3 ± 3.8 2.2 ± 1.7
  • Values are means ± SD in cells/μl. HLA, human leukocyte antigen.

  • * Significant difference between controls and HM or M runners at baseline (P < 0.05 by Mann-Whitney test).

  • Significant difference between end of race and morning postrace (P ≤ 0.05 by paired t-test and Bonferroni correction).