The effects of dehydration before competition upon body compositions, leptin hormone and ghrelin hormone among elite wrestlers

CİCİOĞLU H. İ., Isik O., Yildirim I., ÜNVEREN A., KARAGÖZ Ş.

BIOMEDICAL RESEARCH-INDIA, vol.28, no.10, pp.4335-4341, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 10
  • Publication Date: 2017
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core
  • Page Numbers: pp.4335-4341
  • Keywords: Hydration status, Plasma osmolarity, Leptin hormone, Ghrelin hormone, RAPID WEIGHT-LOSS, BIOCHEMICAL-CHANGES, FOOD-INTAKE, HYDRATION, EXERCISE, FLUID, BALANCE, HUMANS
  • Gazi University Affiliated: Yes


The aim of the study was to determine the changes in body compositions and hydration levels before a competition among elite wrestlers and to demonstrate the difference among leptin and ghrelin hormone levels due to dehydration. Pre and post-test measurements were performed among the twenty-four voluntary wrestlers in before an international tournament. A personal information form that addressed pre-competition weight loss duration and demographic variables was administered to the participant wrestlers. Additionally, body compositions were analyzed using BIA (Bioelectric Impedance Analyzer), and with the help of specialists, 5 cc of blood was drawn from the forearm veins of the wrestlers. Sodium (Na+), Blood Urea Nitrogen (BUN), glucose, leptin and ghrelin levels were analyzed in the blood samples. The wrestlers' Plasma osmolarity (P-Osm) levels were calculated through Na+, BUN and glucose in a mathematical formula. The wrestlers who had P-Osm > 290 mOsm/L constituted the weight loss group while the wrestlers who had P-Osm <= 290 mOsm/L constituted the non-weight loss group. It was identified that all the body composition variables of weight loss group were different both in the pre-test and post-test. Furthermore, BUN, glucose, P-Osm and ghrelin hormone levels of the weight loss group were different whereas there were no differences in sodium and leptin levels. As a result, it was found that wrestlers who lost weight before a competition did it quickly; therefore, wrestlers who underwent significant changes in their body compositions demonstrated serious increases in P-Osm and ghrelin hormone levels.