The Relationship between Leg Muscle Strength and Back Muscle Flexibility on Shooting Results of Futsal Athletes

This study aims to determine the relationship between leg muscle strength and back muscle flexibility to shooting Academy Futsal Athletes in 2022. This research was carried out in the Futsal Academy Bangsal 13 Fc field. The population in this study were all athletes of the soccer school ward 13 as many as 30 people. Sampling was carried out using purposive random sampling , with 10 people being the sample. Data analysis techniques used to test the hypothesis are normality test, linearity test, and correlation test. From the results of the first hypothesis correlation test, a significance value of 0.043 <0.05 was obtained, so there was a significant relationship between leg muscle strength and the results of shooting the ball . The results of the second hypothesis test have a significance value of 0.032 < 0.05, so there is a significant relationship between Back Muscle Flexibility and the results of shooting the ball . Based on the multiple correlation test in the summary model table, it is known that the magnitude of the relationship between Leg Muscle Strength and Back Muscle Flexibility (simultaneously) on the ball shooting results calculated by the correlation coefficient is 0.488, this indicates a moderate effect. Meanwhile, the simultaneous contribution or contribution of the Leg Muscle Strength with Back Muscle Flexibility is 23.8%, while 76.2% is determined by other variables.


INTRODUCTION
Shooting has an important meaning in the game of futsal, in every football match, longdistance kicks are very often carried out by every player, because apart from being used to score goals, they can also be used to provide long passes to teammates or sweeps. in their own defense area (clearent) when attacked by an opponent (Mistahul Ulum, I. K. B. Asra, 2022), (Amir Supriadi, 2022) . Judging from the futsal game, kicking the ball is the basic technique of playing futsal that is most often done in the game. Through this kick will be established cooperation between one Player with other players in one team. In addition, some of the goals occurred through precise and accurate kicks (Tarigan & Winata, 2020). Besides that, do not forget that systematic and sustainable training plays a very important role in producing good physical abilities to support the technique in futsal.
To produce a maximum kick or shooting, in addition to requiring good technical mastery, physical ability also plays a role because far kick results are obtained from good technical mastery as well as good physical condition (Chloé Nurik, 2017). A player must have good leg muscle strength aimed at the strength of the shooting results carried out by the athlete or where the ball wants to be placed besides the back muscle flexibility factor also acts as a connecting factor between these factors because with the flexibility of the back muscles With a good level of flexibility, the flexibility of the back helps support shooting so that the ball will be difficult to reach by the goalkeeper, an athlete's ability to shoot is also influenced by the flexibility of his waist muscles. Flexibility is a person's effectiveness in adjusting himself to carry out all body activities with the widest possible stretching, especially the muscles and ligaments around the back (Fadilah & Wibowo, 2018). This will be very easily marked by the level of flexibility of the whole body, especially the muscles, ligaments. The higher the flexibility of the back, the angle of motion in taking the angle of the back for a whip is also greater so that the power generated also becomes greater (Pujarina & Kumala, 2019). The elements mentioned above are the physical qualities that determine to achieve results in sports.
A trainer must be able to know which parts need to be trained so that the muscles to be used can be strong and this is of course in accordance with the sport to be performed (Abdurrahman Yusuf Anjani Pjt, 2022), . And to increase endurance and muscle strength, training movements are needed that make a player strong and master skills. In addition, the practice should be gradual at first but gradually become special.
In sports activities, power is a very important biomotor component because power will determine how hard people can kick. Power is one element of the physical condition needed for almost all sports, including futsal, power is a combination of several physical elements, namely the element of strength and the element of speed, meaning that the ability of muscle power can be seen from the results of work done using strength and speed, power is the product of strength and speed. Power is the ability of muscles to exert maximum force in a very short time (Effendi, 2018).
The researcher assumes that the strength of the leg muscles and the flexibility of the back muscles of the players are closely related to the shooting results made by the players so that this is a factor that is closely related to a person's ability to perform one of the techniques in the game of futsal. That the factor of leg muscle strength and back muscle flexibility is very influential on the shooting results.
Based on the observations that the researchers saw during futsal training carried out by the Bangsal 13 Fc futsal athletes, it appears that there are several very important elements in carrying out basic shooting techniques including leg muscle strength and back muscle flexibility. These two factors are two things that cannot be separated in their application when shooting, besides that these factors are also key factors for success in shooting when the leg muscle strength is good, then in shooting the direction of the ball will be very good and the flexibility factor of the back muscles, the angle the motion in taking the back angle for a whip is also getting bigger so that the power generated is also getting bigger and can support a person's ability to shoot properly and correctly.
Based on the description above, it can be concluded that between the strength of the leg muscles and the flexibility of the back muscles on the shooting results in futsal, it can be concluded that there is a relationship from one variable to another. Thus, from the above variables, it is expected that a futsal player can have futsal shooting results

METHOD
This research is a correlational study. Correlational research is research conducted to determine whether there is a relationship between two or several variables (Fadilah & Wibowo, 2018). The method used is a kick performance test towards the goal, data collection techniques using measurement tests. This study aims to determine whether there is a relationship between leg length and leg muscle strength with the accuracy of kicks towards the goal.
This research was carried out in the Futsal Academy Bangsal 13 Fc field. The population in this study were all athletes of the soccer school ward 13 as many as 30 people. Sampling was carried out using purposive random sampling, with 10 people being the sample. Data analysis techniques used to test the hypothesis are normality test, linearity test, and correlation test.
To determine whether there is a relationship using the Pearson product moment correlation method with the symbol r. The research design is as follows:

Description of Shooting Futsal Research Results
The results of descriptive statistical analysis for the Shooting variable obtained the Mean = 3.30, Range = 2, Sum = 33, Minimum = 2, Maximum = 4, and Standard Deviation = 0.823.

a. Linearity Test
The linearity test is used to determine whether the relationship between the independent variable and the dependent variable is linear (the graph of the relationship forms a straight line). Linearity testing can be done using the help of SPSS Statistics 20.

Hypothesis testing a. First Hypothesis Test
H0: Leg muscle strength has no significant relationship with ball shooting results.
Ha: Leg muscle strength has a significant relationship with ball shooting results.

The Relationship Between The Strength Of The Limb Muscles And The Results Of Shooting The Balls Of Ward 13 Fc . Academy Players
The results of the research that have been carried out show that there is a significant relationship between leg muscle strength and the results of shooting the ball, this result is shown based on the Pearson correlation test with an rxy value of 0.597 and a significance value of 0.043 < 0.05 then Ho is rejected and Ha is accepted so that there is a significant relationship between Strength leg muscles (X1) with the result of shooting the ball (Y). Based on this statement and complemented by the results of research that has been done, it shows that students who have good coordination can shoot the ball well and smoothly, but on the contrary, leg muscle strength. Bad feet also affect the results of shooting the ball to be not smooth. Thus the results of this study also show that it is important for each student to have and improve leg muscle strength to improve the results of shooting the Bangsal 13 fc ball.