The performance results of the athletes competed in the 1988-2008 Olympic Games were analyzed (n = 166). The data were obtained from the IAAF official protocols. In the principal component analysis, the first three principal components explained 70% of the total variance. In the 1st principal component (with 43.1% of total variance explained) the largest factor loadings were for 100m (0.89), 40...

The overhead throwing athlete is an extremely challenging patient in sports medicine. The repetitive microtraumatic stresses imposed on the athlete's shoulder joint complex during the throwing motion constantly place the athlete at risk for injury. Treatment of the overhead athlete requires the understanding of several principles based on the unique physical characteristics of the overhead athl...

A classic problem of the motion a projectile thrown at an angle to horizon is studied. Air resistance force taken into account with use quadratic law. An analytic approach mainly applied for investigation. Equations are solved analytically arbitrarily large period time. The constructed analytical solutions universal, that is, they can be used any initial conditions throwing. As limit case motio...

The purpose of this study was to use regularised regression models identify the most important biomechanical predictors throwing distance in elite male (M) and female (F) javelin throwers at 2017 IAAF world championships. Biomechanical data from 13 12 who competed championships were obtained an official scientific report. Regularised used investigate associations between release parameters, who...

To simplify the circuit design and control complexity, a wireless charging system with switchable hybrid topology based on an integrated coil structure is proposed in this paper. Constant current (CC) constant voltage (CV) outputs under zero phase angle (ZPA) conditions can be achieved at fixed frequency by simply throwing compensation element receiver. Firstly, modeled using mutual coupling th...

Motion capture was used to monitor the flight of a disc (Discraft Ultrastar 175g) for three throwing techniques. The two main groups of throws were backhand (BH) and forehand (FH) throws, with the forehand throws divided into a closed forehand grip (CF) and a split forehand grip (SF). Sixteen participants were recruited with experience ranging from 3 years to 8 years based on survey. Throws wer...

Closed-kinetic chain resistance training (CKCRT) of the lower body is superior to open-kinetic chain resistance training (OKCRT) to improve performance parameters (e.g., vertical jump), but the effects of upper-body CKCRT on throwing performance remain unknown. This study compared shoulder strength, power, and throwing velocity changes in athletes training the upper body exclusively with either...

BACKGROUND The medial ulnar collateral ligament (MUCL) is an important passive stabilizer to the valgus stresses that athletes experience during overhead throwing motion. However, the role of the flexor-pronator muscles as active stabilizers to valgus stress is not well defined in the literature. The objectives of this study were to quantify the relative contribution of the individual flexor-pr...