PMID- 23514971
OWN - NLM
STAT- MEDLINE
DCOM- 20161219
LR  - 20161230
IS  - 1875-8622 (Electronic)
IS  - 1386-0291 (Linking)
VI  - 60
IP  - 4
DP  - 2015
TI  - Associations among hemorheological factors and maximal oxygen consumption. Is 
      there a role for blood viscosity in explaining athletic performance?
PG  - 347-62
LID - 10.3233/CH-131708 [doi]
AB  - This study examined the relationship between hematocrit, blood viscosity, plasma 
      viscosity, erythrocyte deformability, and fibrinogen concentration during maximal 
      oxygen uptake in aerobically trained (AT) and resistance trained (RT) athletes. 
      Maximal oxygen uptake was assessed using a Bruce graded exercise treadmill test 
      to exhaustion, and blood samples were collected at rest and immediately following 
      exercise using a venous catheter. Viscometric analyses were performed using a 
      cone and plate viscometer at varying shear rates. Hematocrit was measured as the 
      fraction of erythrocytes suspended in plasma following centrifugation. 
      Erythrocyte rigidity was estimated using the Dintenfass index of red blood cell 
      rigidity. Following maximal treadmill exercise, an increase of blood viscosity at 
      varying shear rates (22.50, 45.00, 90.00, and 225.00 s- 1; P <  0.05) was 
      observed in RT athletes only. Plasma viscosity @ 225.00 s- 1 (1.88 +/- 0.09 vs. 
      1.78 +/- 0.03 mPa.s; P <  0.05), erythrocyte rigidity (0.52 +/- 0.08 vs. 0.40 +/- 0.09; 
      P <  0.05), and plasma fibrinogen (434 +/- 7 vs. 295 +/- 25 mg/dL; P <  0.01) were 
      all significantly greater in RT than AT athletes following maximal exercise. In 
      summary, AT, but not RT, is associated with a hemorheological profile that 
      promotes both oxygen transport and delivery. The results indicate that hematocrit 
      alone should not be the focus of training and ergogenic supplementation to 
      increase aerobic performance.
FAU - Smith, Michael M
AU  - Smith MM
AD  - Department of Human Sciences - Kinesiology Program, The Ohio State University, 
      Columbus, OH, USA.
FAU - Lucas, Alexander R
AU  - Lucas AR
AD  - Department of Human Sciences - Kinesiology Program, The Ohio State University, 
      Columbus, OH, USA.
FAU - Hamlin, Robert L
AU  - Hamlin RL
AD  - College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA.
FAU - Devor, Steven T
AU  - Devor ST
AD  - Department of Human Sciences - Kinesiology Program, The Ohio State University, 
      Columbus, OH, USA.
LA  - eng
PT  - Journal Article
PL  - Netherlands
TA  - Clin Hemorheol Microcirc
JT  - Clinical hemorheology and microcirculation
JID - 9709206
SB  - IM
MH  - Adult
MH  - Athletic Performance/*physiology
MH  - Blood Viscosity/*physiology
MH  - Hemorheology
MH  - Humans
MH  - Male
MH  - Oxygen Consumption/*physiology
MH  - Young Adult
OTO - NOTNLM
OT  - Fibrinogen
OT  - erythrocyte
OT  - exercise
OT  - hematocrit
OT  - viscosity
EDAT- 2013/03/22 06:00
MHDA- 2016/12/20 06:00
CRDT- 2013/03/22 06:00
PHST- 2013/03/22 06:00 [entrez]
PHST- 2013/03/22 06:00 [pubmed]
PHST- 2016/12/20 06:00 [medline]
AID - MXK526645Q5QP225 [pii]
AID - 10.3233/CH-131708 [doi]
PST - ppublish
SO  - Clin Hemorheol Microcirc. 2015;60(4):347-62. doi: 10.3233/CH-131708.