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Prommer, Nicole ; Thoma, Stefanie ; Quecke, Lennart ; Gutekunst, Thomas ; Völzke, Christian ; Wachsmuth, Nadine ; Niess, Andreas Michael ; Schmidt, Walter:
Total Hemoglobin Mass and Blood Volume of Elite Kenyan Runners.
In: Medicine & Science in Sports & Exercise.
Bd. 42
(April 2010)
Heft 4
.
- S. 791-797.
ISSN 1530-0315
DOI: https://doi.org/10.1249/MSS.0b013e3181badd67
Abstract
Several East Africans are among the most successful runners worldwide. The physiological reasons underlying this superiority are, however, not yet known. Purpose: To evaluate the total hemoglobin mass (tHb-mass) and blood volume (BV) of Kenyan runners and their adaptation to near sea level. Methods: tHb-mass, BV, and (V) over dotO(2max) were determined in 10 male Kenyan runners (10-km best time = 28:29 +/- 00:27 min) residing at an altitude of 2090 m over the course of a 6-wk training camp at sea level. Their values were compared with those of elite German runners (10-km best time = 30:39 +/- 00:24 min). Results: Kenyans are characterized by significantly lower body mass (Kenyans = 57.2 +/- 7.0 kg; Germans = 66.5 +/- 6.3 kg) and body mass index (Kenyans = 18.5 +/- 0.9; Germans = 20.4 +/- 0.9). Relative tHb-mass (Kenyans = 14.2 +/- 1.0 g.kg(-1); Germans = 14.0 +/- 0.7 g.kg(-1)) and BV (Kenyans = 101.9 +/- 4.5 mL.kg(-1); Germans = 99.6 +/- 5.8 mL.kg(-1)) were similar in both groups but were decreased in Kenyans during the stay at near sea level (absolute tHb-mass from 813 +/- 90 g.mL(-1) to 767 +/- 90 g, P < 0.001; BV from 5828 +/- 703 g.mL(-1) to 5513 +/- 708 mL, P<0.01). Relative (V) over dotO(2max) was similar in both groups (Kenyans 71.5 +/- 5.0 mL.kg(-1).min(-1); Germans 70.7 +/- 3.7 mL.kg(-1).min(-1)). Conclusion: The oxygen transport of the blood cannot explain the superior endurance performance of Kenyan runners. Most measured parameters are in the same range as those of elite German runners, and tHb-mass even deteriorates after an adaptation to near sea level
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | ISI:000275730500022 |
| Keywords: | (V) over dotO(2max); adaptation; ADAPTATION TO NORMOXIA; AFRICAN; altitude; blood; blood volume; BLOOD-VOLUME; BODY; cAMP; CO-REBREATHING METHOD; COUNT; DISTANCE RUNNERS; endurance; endurance performance; erythropoietin; EXERCISE PERFORMANCE; hemoglobin; hemoglobin mass; HIGH-ALTITUDE NATIVES; HIGH-TRAIN LOW; hypoxia; INDEXES; Kenyan; Male; MASS; method; methods; OXYGEN; oxygen transport; OXYGEN-TRANSPORT; PARAMETERS; PERFORMANCE; plasma volume; RED-CELL VOLUME; runners; RUNNING ECONOMY; SCANDINAVIAN RUNNERS; SEA-LEVEL; Sport; SPORTS; TIMES; total hemoglobin; training; TRANSPORT; VALUES; VOLUME |
| Institutionen der Universität: | Fakultäten > Kulturwissenschaftliche Fakultät > Institut für Sportwissenschaft > Professur Sportwissenschaft IV (Sportmedizin/Sportphysiologie) Fakultäten > Kulturwissenschaftliche Fakultät > Ehemalige Professoren > Professur Sportwissenschaft IV (Sportmedizin/Sportphysiologie) - Univ.-Prof. Dr. Walter Schmidt Fakultäten Fakultäten > Kulturwissenschaftliche Fakultät Fakultäten > Kulturwissenschaftliche Fakultät > Institut für Sportwissenschaft Fakultäten > Kulturwissenschaftliche Fakultät > Ehemalige Professoren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit |
| Eingestellt am: | 22 Nov 2017 09:13 |
| Letzte Änderung: | 23 Nov 2017 08:13 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/40428 |