scholarly journals Muscle strength and jump ability of the supporting leg in relation to ball speed during instep kicks in soccer, focusing on differences in approach speed

Author(s):  
Yasushi Kariyama ◽  
Masato Watarai ◽  
Koji Zushi
2020 ◽  
Vol 22 (4) ◽  
pp. 23-33
Author(s):  
Won-Ho Choi ◽  
Yun-A Shin

OBJECTIVES Several studies have reported that weighted baseball (WB) training is effective in improving ball speed; however, the weight of the ball suitable for training remains unclear. This study aimed to investigate the changes in muscle activity during pitching using 5- to12-oz WBs and to provide basic data for training programs to improve pitching speed.METHODS The subjects of this study were 10 overhand pitchers who had more than 5 years of experience. Muscle activity was measured and analyzed at 70–85% of throwing baseball maximum effort (TBME) during soft toss (ST) and TBME was evaluated using electromyography.RESULTS As the ball weight increased, muscle activity also increased in all pitching phases. Muscle activity was higher during ST with WBs heavier than 10 or 11oz than during TBME, indicating that the loads on the shoulder and elbow joint muscles increased. Conversely, muscle activity during ST with 5- to 7-oz WBs was lower than that during TBME, although phase and muscle group differences were observed.CONCLUSIONS The results of this study suggest that training with 8- to 10-oz WBs could increase muscle strength and activity, although the effect may vary with fitness level and muscle strength.


2016 ◽  
Vol 26 (1) ◽  
pp. 21-27
Author(s):  
Bojan Rakojević ◽  
Vladimir Mrdaković

The main purpose of this paper is to explain the main factors for performance quality of soccer instep kick. Kicking performance of the soccer players could be assessed through the measures of kicking accuracy and ball velocity. The most important factors are approach angle, approach speed and instruction. Also, ball-foot interaction in impact phase during instep soccer kick is very important for performance quailty of instep kick. Speed and foot stiffness have a positive correlation with the speed of the ball, so for the achievement of higher ball speed it is necessary to achieve the maximum speed of the foot before and at the time of contact with the ball. At the same time the strain level of the foot at the moment of contact with the ball should be minimized. In addition, researches were showed that power and strength level of the lower extremity muscles has a positive effects on instep kick performance.


2021 ◽  
Vol 11 (2) ◽  
pp. 655
Author(s):  
Henrieta Horníková ◽  
Erika Zemková

The relationship between the change of direction speed (CODS) and sprint speed, jump ability, and muscle strength is well recognized. However, the strength of this relationship may depend on how the test is designed and which parameters are analyzed. This scoping review aims to: (1) map the literature that addresses the relationships between the CODS and physical fitness and performance variables in players of team sports; (2) specify the limiting factors of CODS; and (3) identify gaps in existing literature and propose future research on this topic. Altogether, 22 research studies met the defined inclusion criteria. Most studies revealed significant correlations between CODS and sprint speed, muscle strength, and jump ability. This relationship was mainly demonstrated between CODS and linear sprint speed for 30 m (r = 0.60 to 0.74), 10 m (r = 0.39 to 0.65), maximal leg strength (r = −0.51 to −0.89), particularly explosive (r = −0.44 to −0.81), and reactive strength (r = −0.37 to −0.65). However, the strength of this relationship depends on the type of CODS test, its structure (total running distance, number of changes in direction), and parameters analyzed (height, power, velocity, and relative or absolute values). The recommendation for future research is to focus on choosing the test and its parameters to be close to the fitness demands of the particular sport.


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