The effect of different degrees of weight reduction on the values of ground reaction force during the lift movement in elite weightlifters

Introduction: Weightlifting is a sport that is performed in different weights. The purpose of the present study was to investigate the effect of different degrees of weight loss on the values of ground reaction force during the lift movement in elite weightlifters. Methodology: The current research was semi-experimental. The statistical sample of the research was selected using the available method and included 10 elite weightlifters (at least 3 years of experience in national competitions, age: 25.50±0.75 years, weight: 99.4±4.9 kg, height: 1. was 178.8±4 cm). The ground reaction force data was measured at 1000 Hz during the isometric lift movement before and after weight loss equal to 2 and 4% of body weight. Two conditions of weight loss were performed with an interval of one week. The selection of weight loss conditions of 2 or 4% of body weight on the first day was randomly selected. For the statistical analysis of the data, two-way analysis of variance with repeated measures was used at a significance level of 0.05. Results: The results showed that the peak vertical ground reaction force decreased after 2% weight loss and increased after 4% weight loss (P<0.05). Conclusion: The decrease in body mass percentage leads to an increase in ground reaction forces, which can be a mechanical risk factor for orthopedic injuries.