Association of Hematological Variables with Team-Sport Specific Fitness Performance

作者：Brocherie Franck^*; Millet Gregoire P; Hauser Anna; Steiner Thomas; Wehrlin Jon P; Rysman Julien; Girard Olivier

来源：PLos One, 2015, 10(12): e0144446.

DOI：10.1371/journal.pone.0144446

Purpose
We investigated association of hematological variables with specific fitness performance in elite team-sport players.
Methods
Hemoglobin mass (Hb(mass)) was measured in 25 elite field hockey players using the optimized (2 min) CO-rebreathing method. Hemoglobin concentration ([Hb]), hematocrit and mean corpuscular hemoglobin concentration (MCHC) were analyzed in venous blood. Fitness performance evaluation included a repeated-sprint ability (RSA) test (8 x 20 m sprints, 20 s of rest) and the Yo-Yo intermittent recovery level 2 (YYIR2).
Results
Hb(mass) was largely correlated (r = 0.62, P<0.01) with YYIR2 total distance covered (YYIR2TD) but not with any RSA-derived parameters (r ranging from -0.06 to -0.32; all P>0.05). [Hb] and MCHC displayed moderate correlations with both YYIR2TD (r = 0.44 and 0.41; both P<0.01) and RSA sprint decrement score (r = -0.41 and -0.44; both P<0.05). YYIR2TD correlated with RSA best and total sprint times (r = -0.46, P<0.05 and -0.60, P<0.01; respectively), but not with RSA sprint decrement score (r = -0.19, P>0.05).
Conclusion
Hb(mass) is positively correlated with specific aerobic fitness, but not with RSA, in elite teamsport players. Additionally, the negative relationships between YYIR2 and RSA tests performance imply that different hematological mechanisms may be at play. Overall, these results indicate that these two fitness tests should not be used interchangeably as they reflect different hematological mechanisms.

• 出版日期2015-12-7