TY - JOUR
T1 - Association of hematological variables with team-sport specific fitness performance
AU - Brocherie, Franck
AU - Millet, Grégoire P.
AU - Hauser, Anna
AU - Steiner, Thomas
AU - Wehrlin, Jon P.
AU - Rysman, Julien
AU - Girard, Olivier
PY - 2015/12/1
Y1 - 2015/12/1
N2 - Purpose: We investigated association of hematological variables with specific fitness performance in elite team-sport players. Methods: Hemoglobin mass (Hbmass) 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: Hbmass 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: Hbmass 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.
AB - Purpose: We investigated association of hematological variables with specific fitness performance in elite team-sport players. Methods: Hemoglobin mass (Hbmass) 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: Hbmass 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: Hbmass 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.
UR - http://www.scopus.com/inward/record.url?scp=84955451926&partnerID=8YFLogxK
U2 - 10.1371/journal.pone.0144446
DO - 10.1371/journal.pone.0144446
M3 - Article
C2 - 26641647
AN - SCOPUS:84955451926
VL - 10
JO - PLoS One
JF - PLoS One
SN - 1932-6203
IS - 12
M1 - e0144446
ER -