Static stretching and low-intensity activities such as jogging are two traditional warm-up exercises used by many coaches in multiple different sports. However, studies have shown that static stretching before physical activities can actually compromise performance instead of increasing flexibility and/or range of motion of a specific joint. Because of these findings, coaches and authors started to examine other alternatives such as dynamic stretching routines to analyze how it would affect performance. For instance, studies done previously have proved that dynamic stretching can positively affect vertical jump height, 20 meters spring and leg extension power output. Additionally to that, the intensity, volume, duration and type of dynamic …show more content…
The main instruction for this session was to lower the leg press platform slowly until participant’s legs reached 90º of flexion and then push back up until their legs are at 0º of extension. For the vertical jump assessment, participants performed three maximal vertical jump attempts prior to and following each condition with a 30 seconds rest between each attempt. For this experiment, the highest vertical jump (in centimeters) of the three trials was used as a representative value. The speed of vertical jump was also studied in this experiment where a Tendo Weightlifting Analyzer was attached behind the subject in a position where the cord could fully extend without blocking the vertical jump amplitude. Again, the highest average velocity was used as the value for the …show more content…
As the results have shown, dynamic stretching in the first condition increased athlete’s performance in vertical jump height and velocity, flexibility, and muscular endurance whereas the dynamic stretching in condition 2 showed a significant decrease in muscular endurance. Additionally, 5 minutes jog, which is common among the conditions of the experiment, did not have any impact on vertical jump, but it did have an effect in flexibility. All vertical jumps had improvements after dynamic stretching, but muscular endurance decreased after an average of 12 minutes of dynamic
Huang C, Hsieh T, Lu S, Su F. (2011). Effect of Kinesio tape to muscle activity and vertical jump performance in healthy inactive people. Biomed Eng Online 10; 70. Kase K, Wallis J, Kase T. (2003) Clinical Therapeutic Applications of the Kinesio Taping Methods.
Scibek, J. S., Gatti, J. M., & Mckenzie, J. I. (2012). Into the Red Zone. Journal of Athletic Training, 47(4), 428-434.
This experiment was completed in order to compare calf circumference as well as weight to jump height. If a person has larger calves then they will likely be capable of reaching a higher vertical height. It can also be shown that since males tend to have larger calves, they can jump higher. A larger calf circumference is more likely to reflect a high vertical jump due to the fact that the fat content of the calves in the experiment was accounted for, therefore a large calf measurement in this experiment means a muscular calf. It is common knowledge that more muscle will result in stronger legs leading to a higher vertical.
This lab explored the relationship between EMG and force and EMG and fatigue. It has been shown that EMG, fatigue and force levels are dependent upon type of contraction and whether or not the contraction is maximal or sub maximal. Seliger et al. (1980) gained insight into the differing force and EMG profiles of isometric, eccentric and concentric contractions. Fourteen subjects underwent a maximum voluntary contraction in the squat of the concentric, isometric and eccentric variations. He showed that the EMG activity in the rectus femoris showed little statistical difference. However the force reading showed its highest values during an eccentric contraction, it's lowest values during concentric contractions and its second highest values during isometric contractions (Seliger, 1980).
This skill involves jumping in the sagittal plane about the transverse axis. It consists of hip, knee, ankle, and shoulder joints. In the preparation phase in propulsion, the subject has flexed knees and hips which will need to be straightened by the strength of their corresponding joints such as the hinge joint at the knee joint. The hip joint is a ball and socket joint that bears the body weight and allows for jumping motion. During th...
A basketball Jump shot also known as a jumper is one of the most important shots in the game. Its purpose is for the player to jump, usually straight up and while in the mid-air attempt to score while arcing the ball in the basket. Jumps shots are known for winning games, especially crucial last second shots such as mine but it’s a skill that a player should be familiar and have knowledge of. Although it seems simple and easy its actually is a very detailed and mechanical aspect to the game which is why I choose to analyze the biomechanics of a basketball jump shot.
Basketball is a "transition game. Players continuously switch between defensive and offensive plays throughout the game. The plays include strenuous physical, such as running/sprinting, cutting, feints, jumps, and landings. Rapid turns and proximity during one-on-one situations increase the possibility of physical contact. Thus, frequent intermittent running and sprinting characterize the action of the game. Motion analysis has shown that depending on individual playing-time; basketball players cover a distance between 4.6 and 5.8 km per game, with mean heart rates between 80 and 90% of individual maximum heart rates (European Network for Sports injuries prevention, 2008). Consequently, players need to rid of highly advanced basic...
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Creative new training methods, developed by coaches, athletes and sport scientists, are aimed to help improve the quality and quantity of athletic training ( Kellmann, 2010, p.1). However, these methods have encountered a consistent set of barriers including overtraining ( Kellmann, 2010, p.1). Due to these barriers, the need for physical and mental recovery in athletics brought an increasing attention in practice and in research ( Kellmann, 2010, p.1).
[3] H. S. Milner-Brown, R. B. Stein, and R. Yemm. "The Orderly Recruitment of Human Motor Units during Voluntary Isometric Contractions." The Physiological Society 230th ser. (1973): 359-70. Web. 22 May 2014.
In the preparation phase is taken place in a sagittal plane. The knees and hips are flexed prior to the extension. It pre-stretches the muscles that contracts in the jump. From an upright standing position at….. degree angle, the player initiates a decelerating downward movement where the abdominals are contracted to …….degree angle. The downward motion flexes the hips by eccentric contraction in the gluteus maximus, semimembranosus, Semitendinosus, and Biceps Femoris. In this downward movement, the knees are flexed causing a concentric contraction at ……… degrees on the Rectus Femoris, Vastus medialis, vastus intermedius, and vastus lateralis. The flexed knee also causes an eccentric contraction on the hamstring on the bicep femoris, semitendinosus, semimembranosus. Whilst the lower body is in a bend position, the upper body such as the shoulder girdle are elevated. The scapulothoracic is elevated by the levator scapulae, rhomboids and the middle fibers of the trap while the shoulder joint muscles are flexed by isometric contraction by the flexors of the anterior fibers of the deltoid, pectoralis major and coracobrachialis. As the individual holds the ball and moves into this crouched position, the elbow are flexed at degree ...
The purpose of the squat is to train the muscles around the knees and hip joints, as well as to develop strength in the lower back, for execution of basic skills required in many sporting events and activities of daily living. Because a strong and stable knee is extremely important to an athlete or patient’s success, an understanding of knee biomechanics while performing the squat is helpful to therapists, trainers, and athletes alike (11). Because most activities of daily living require the coordinated contraction of several muscle groups at once, and squatting (a multi-joint movement) is one of the few strength training exercises that is able to effectively recruit multiple muscle groups in a single movement, squats are considered one of the most functional and efficient weight-bearing exercises whether an individual’s goals are sport specific or are for an increased quality of life
Today, millions of people have discovered the benefits of stretching. Over the last years, studies have shown that people that live these active lives live fuller lives. In fact, studies show that a lack of physical activity directly relates to many major illnesses and death. Before the Industrial Revolution, people actually had to work hard to get their needed amount of movement. After the Revolution, it became a different story. People no longer needed to work physically to make a life for themselves. With this lack of movement came lack of flexibility. Now, everywhere you look, you see people out jogging, hiking, and playing golf, tennis, and other sports to stay active. The fitness trend is in; but it’s not a trend anymore. Now, it’s a way of life. Stretching is an important part of this way of life that many people leave out.