摘要：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 aim was 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 short period in randomized
order using the same methods. They have experienced 1-day, 3-days and 7-days) 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. It is necessary to study the influence of weight loss cycling on athlete’s disease
risk in the future.
关键词：aldosterone ; dehydration ; body composition ; oxidative stress ; rapid weight loss
