Endocrine response to an ultra-marathon in pre- and post-menopausal women
Deutscher übersetzter Titel: | Endokrinreaktion auf einen Ultra-Marathon bei prä- und postmenopausalen Frauen |
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Autor: | Copeland, Jennifer L.; Verzosa, M. L. Sophia |
Erschienen in: | Biology of sport |
Veröffentlicht: | 31 (2014), 2, S. 125-131, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0860-021X, 2083-1862 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201409008905 |
Quelle: | BISp |
Abstract
Ultra-endurance competitions are becoming increasingly popular but there is limited research on female participants. The purpose of this study was to examine changes in estrogen and the IGF-I system in women after an ultra-marathon. Six pairs of pre- and post- menopausal women were matched for race finish times; mean finish time was 20 hours. Blood samples were drawn 24 hours before the race, at the finish, and 24 hours into recovery. Samples were analysed for estradiol, total IGF-I, IGFBP-1, and intact IGFBP-3. There was a significant increase in estradiol following the race in both groups (P<0.05). Total IGF-I decreased after the race (P<0.01) and remained lower in recovery. IGFBP-1 increased after the race (P<0.001) but returned to pre-race levels after 24 hours, while intact IGFBP-3 was significantly lower post-race and in recovery (P<0.001). Postmenopausal women had significantly lower estradiol at baseline, but there were no other group differences. These results demonstrate that among recreational female runners, an ultra-marathon is associated with IGF system changes that are consistent with an energy-deficient, catabolic state. Further research is needed to confirm the effect of these endocrine changes on health and performance. Verf.-Referat