Physiological effects of weight cycling in female lightweight rowers
Deutscher übersetzter Titel: | Physiologische Auswirkungen von haeufigen Koerpergewichtsschwankungen bei Ruderinnen der Leichtgewichtklasse |
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Autor: | McCargar, Linda J.; Simmons, Deanna; Craton, Neil; Taunton, Jack E.; Birmingham, C. Laird |
Erschienen in: | Canadian journal of applied physiology |
Veröffentlicht: | 18 (1993), 3, S. 291-303, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1066-7814, 1543-2718 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199405071377 |
Quelle: | BISp |
Abstract
Repeated cycles of weight loss and regain are referred to as weight cycling. It is a practice of many athletes who must achieve a low body weight. The purpose of this study was to determine whether a history of weight cycling results in sustained metabolic changes. Healthy female rowers with a history of dieting and weight fluctuation (n = 7) were compared to a control group of rowers who had never dieted (n = 7). Anthropometric and metabolic measurements were done at pre-, peak, and off-season during a 1-year period. At peak season the weight cyclers restricted their food intake and lost 4.2 +/- 1.8 kg, and subsequently regained 4.0 +/- 2.1 kg in the off-season. This was different from the controls (p = .003), who maintained a stable body weight at all times. No other group differences were observed. Resting metabolic rate (RMR) and triiodothyronine (T3) changed with time (p = .001, p = .000, respectively) in both groups, which appeared to reflect changes in fat free mass (FFM), not body weight. Long-term metabolic changes were not observed in these athletes. Verf.-Referat