THE EFFECT OF BORON SUPPLEMENTATION ON FREE TESTOSTERONE ACTIVITY IN THE BLOOD DURING MUSCLE STRENGTH TRAINING OF VOLLEYBALL PLAYERS

Objective. Boron is found naturally in the environment, plants absorb it from the soil because it is essential for its growth, and humans achieve it thanks to the consumption of plant-based foods such as fruits and vegetables (The human body contains about 0.7 mg per kilo of boron weight).The aim of this investigation was to explore the effect of boron supplementation on free testosterone activity in the blood during muscle strength training of volleyball players. Methods. Sixteen volleyball players, Eltayaran club, divided into two groups. The experimental group (n =8) take boron supplement contains boron mineral salts the boron supplement has been taken in a daily dose(2MG) in the last 4 weeks in the program for the experimental group. In the days that there is no weight training, In the morning after breakfast and in the days when weight training was done, two doses were used in the morning after breakfast and one in the meal, which precedes the training, based on the expert opinion. and control group (n = 8) (placebo) performed traditional exercise. Subjects were required to read and complete a health questionnaire and informed consent document; there was no history of injuries, diabetes or recent surgery.Results. The results showed statistically significant differences:1. between the experimental group and control group in Free Testosterone After effort for posttest to the experimental group. No Significant Difference Free Testosterone at rest2. between the experimental group and control group in Leg Static strength, Back Static strength, Vertical Jump, Seated Medicine Ball Throw for posttest to the experimental group Conclusion. In conclusion, our data suggest that (4) weeks boron supplementation could improvement of Free Testosterone After effort, Leg Static strength, Back Static strength, Vertical Jump, Seated Medicine Ball Throwin volleyball players.