at Google ScholarTitle data
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.
Vol. 42
(April 2010)
Issue 4
.
- pp. 791-797.
ISSN 1530-0315
DOI: https://doi.org/10.1249/MSS.0b013e3181badd67
Abstract in another language
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
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | 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 |
| Institutions of the University: | Faculties > Faculty of Cultural Studies > Department of Sport Science > Professor Sport Science IV - Sports Medicine and Sports Physiology Faculties > Faculty of Cultural Studies > Former Professors > Professor Sport Science IV - Sports Medicine and Sports Physiology - Univ.-Prof. Dr. Walter Schmidt Faculties Faculties > Faculty of Cultural Studies Faculties > Faculty of Cultural Studies > Department of Sport Science Faculties > Faculty of Cultural Studies > Former Professors |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 600 Technology, medicine, applied sciences > 610 Medicine and health |
| Date Deposited: | 22 Nov 2017 09:13 |
| Last Modified: | 23 Nov 2017 08:13 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/40428 |