Does erythrocyte infusion improve 3.2-km run performance at high altitude?
| Autor: | M. W. Sharp, R. R. Cote, J L Kenney, Andrew J. Young, B J Freund, Michael N. Sawka, C. R. Valeri, Kent B. Pandolf |
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| Rok vydání: | 1998 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test Physiology Chemistry medicine.medical_treatment Public Health Environmental and Occupational Health General Medicine Hematocrit Effects of high altitude on humans Hypoxia (medical) Surgery Animal science Altitude Endurance training Physiology (medical) Heart rate medicine Aerobic exercise Orthopedics and Sports Medicine medicine.symptom Saline |
| Zdroj: | European Journal of Applied Physiology. 79:1-6 |
| ISSN: | 1439-6327 1439-6319 |
| DOI: | 10.1007/s004210050465 |
| Popis: | The effects of autologous erythrocyte infusion on improving exercise performance at high altitude have not previously been studied. The effects of erythrocyte infusion on 3.2-km (2-mile) run performance were evaluated during 3 days (HA3) and 14 days (HA14) exposure to high altitude (4300 m) in erythrocyte-infused (ER) and control (CON) subjects that were initially matched (P > 0.05; n = 8 in each group) for age, body size and aerobic fitness. After sea-level runs (SL; 50 m), unacclimated-male subjects received either 700 ml of saline and autologous erythrocytes (42% hematocrit; ER) or saline alone (CON). The 3.2-km run times (min:s) did not differ (P > 0.05) between groups at SL [mean (SEM) ER, 13:14 (00:19); CON, 13:39 (00:32)] or during HA3 [ER, 19:02 (00:18); CON, 19:44 (00:43)] and HA14 [ER, 17:44 (00:27); CON, 18:45 (00:55)] but times were slower (P 0.05) for ER compared to CON. Thus, no significant improvements in 3.2-km run performance were associated with erythrocyte infusion, although the ER group showed a tendency to run slightly faster at high altitude. |
| Databáze: | OpenAIRE |
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