Effects of different periods of rapid weight loss on dehydration and oxidative stress
Background and Study Aim: Many athletes will lose weight 5% or more within 7 days. Many reports have been published on the negative health effects of rapid weight loss (RWL) in wrestlers. This study aims to examine the effects of different periods of RWL on dehydration state and oxidative stress.
Materials and Methods: Participants were nine male collegiate wrestlers who reduce their body mass by 5% within 7, 3, or 1 day in randomized order using the same methods. They have experienced (7-day, 3-day, and 1-day) weight loss separated by more than 4 weeks. All participants reduced 5% of their body mass in all trials. Following the weight loss, they tried to regain all of their lost weight with an ad libitum diet for 14 h. Body composition and biochemical variables were measured at baseline and immediately after weight loss and weight regain.
Results: There were no statistically significant differences in hematocrit, serum sodium, chloride, potassium, calcium, osmotic pressure, and antidiuretic hormone. For plasma aldosterone concentrations and plasma d-ROMs concentrations, two-way analysis of variance revealed the main effect of time (P < 0.05). RWL (loss of 5% of body weight within 7 days) is surmised to have increased oxidative stress via dehydration and elevated levels of aldosterone.
Conclusions: Although different weight loss periods did not yield any changes, RWL of 5% of body weight was suggested to increase oxidative stress.
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|Subjects:||combat sport wrestling male youth junior elite sport regulation method body indices weight fluid body|
|Notations:||combat sports biological and medical sciences|
|Tagging:||oxidativer Stress Dehydration|
|Published in:||Archives of Budo|