The research aimed to identify: the effect of functional strength training to development the strength of the trunk muscles and the motor balance of the kadit of kurogy in Taekwondo, and the researcher used the experimental method for a sample of (15) cadet from the taekwondo team in the Employees club at Zagazig University. Tools of research are: core muscle strength tests – motor balance tests to kicks - functional strength training program. The researcher used the following statistical treatments: the mean - the standard deviation - the median - the torsion coefficient - the "T" test - the correlation coefficient - the equation of improvement rates. Among the most important findings and conclusions: - The use of functional strength training led to the development of core muscle strength and motor balance while performing some kicks, "Ap Chagi, dolyo Chagi, Yap Chagi" for Taekwondo beginners in the sport of kyroge The researcher recommends the importance of: - The use of functional strength training for cadit in kyroge in taekwondo, and the use of the proposed training program to improve the strength of the muscles of the trunk and improve the motor balance the cadet of kyroge in taekwondo.