Kinesiology Of Overhead Press
While the so called "king" of the upper body lifts is the bench press, a very important lift for explosive upper body strength is the shoulder, or military, press. Focusing on more the more athletic oriented deltoids rather than the physique-enhancing chest, the military press is a staple of all athletic work-outs. The shoulders are made up of eleven muscles, of which the deltoids are the most important. The "delts" are actually composed of three separate parts or "heads." The anterior deltoid is found on the front part of the shoulder and is used when raising the upper arm forward; the middle deltoid is located on the side of the shoulder and is involved when lifting the upper arm sideways (away from the body); the posterior deltoid resides on the back of the shoulder and draws upper arm backwardThere are several variations in this lift, including standing or back-supported seated versions. The shoulder press can also be executed using dumbbells, a barbell, or some type of exercise machine. This paper will concentrate and describe the seated, barbell version. To perform this movement, sit down and place your feet flat on the floor. Grasp the bar and space your hands slightly wider than shoulder width apart. The bar s
The shoulder joint is very mobile and thus easy to pop out of socket. Upper Extremities The anterior and lateral deltoid and supraspinatus muscles now eccentrically contract, providing a slowing process and control rather than an explosive lift. The main focus is the deltoid muscles but supporting muscles such as the trapezius and lower extremity muscles such as the triceps fire as well. The shoulder girdle remains upwardly rotated and is elevated, the trapezius II and IV contract along with the serratus anterior. The wrist remains extended, the radia-ulna joint remains pronated and the hand is still flexed around the barbell. There will be a slight backwards push to raise the bar over your head. Upper Extremities The shoulder is both abducted and extended as it bears the weight of the barbell. Use of a backrest is encouraged to provide additional support. Pause briefly in this position and then return the weight under control to the starting position. Strong shoulders lower the chances of injury and improve the stability of the joint, while enhancing the explosive actions of the athlete. The shoulder girdle is elevated and upwardly rotated. Technical Analysis of the Seated Military Barbell PressStarting PositionLower Body The ankle is slightly flexed, simply because of the seated body position. As the shoulder cap grows in size and definition, the arm begins to look more impressive to those interested (be it bodybuilding judges or members of the opposite sex) .
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