Although biological acceleration is an important factor in wrestling success in younger age groups, the results in sport-specific tests depend on many other parameters such as experience or technique. The study was conducted to determine the association between biological development acceleration and sport-specific wrestling tests. Biological development acceleration was estimated according to the method of Mirwald and associates (2002) on a sample of 40 wrestlers aged 11 to 14 years. Correlation analysis found a connection between biological development acceleration and results in the SJFT (Specific judo fitness test) test, originally designed in judo but adapted for wrestling. All variables were processed by descriptive statistics. Group differences were tested by the Kruskal-Wallis ANOVA test and the Mann-Whitney U test, while the association was tested by correlation analysis. The hypothesis that there was a statistically significant difference between the groups in the results of the SJFT test was partially accepted since it was found that biologically mature wrestlers performed better in the SJFT test than the more mature but not significantly. The second hypothesis that there is a statistically significant correlation between the SJFT test and the results at competitions, ie experience, is fully accepted. Correlation showed that career placement and number of matches were related to total throws while career placement was related to SJFT test index. Children of the same chronological age may differ by biological age, while children of earlier biological development may be significantly physically superior to their peers. It is up to the trainers to recognize when the child at this sensitive stage has entered the developmental process. In addition, the trainer should know the benefits and limitations of that age in order to properly apply the training systems. He should also understand at a high level the anatomical, physiological and anthropological development of a child at puberty.