Sentences with phrase «shoulder flexion»

Therefore the data indicates that the latissimus dorsi displays peak moment arm lengths between 10 — 71 degrees of shoulder flexion depending on the region measured.

Keuchle et al. (1997) reports the change in moment arm length with the change in shoulder flexion range of motion.

Ackland et al. (2008) showed that the anterior deltoid provided the largest peak moment arm length during shoulder flexion in the scapular plane displaying a peak muscle moment arm of 39.3 mm at 120 degrees (arms over head).

Therefore, the superior performance of the flat bench press over the incline bench press for the sternocostal head is probably because there is a greater horizontal shoulder adduction moment in the flat and decline variations, but a larger shoulder flexion moment in the incline variations.

As is clear from the chart below, the anterior deltoid has a large shoulder flexion moment arm length, which makes it a prime mover in this movement.

This may imply that exercises with peak contractions at different points in the total shoulder flexion range of motion are necessary in order to work all muscle fibers to a similar extent.

Being close to the deltoid muscle, the clavicular head significantly contributes to flexion, horizontal adduction and inward rotation of the humerus, and is best engaged with exercises which involve shoulder flexion and movements that end with your elbows above your clavicle.

Ackland et al. (2008) reported that the peak moment arm length of the latissimus dorsi was displayed in a wide range between 10 — 71 degrees of shoulder flexion depending on the muscle region measured.

Peak moment arm lengths of the pectoralis major for performing shoulder flexion or extension range between +53.7 mm to -9.3 mm, but these moment arm lengths depend on the point in the overall joint range of motion where they are measured, and also on the section of the pectoralis major that is measured (superior, middle or inferior)(Ackland et al. 2008).

This may imply that exercises with peak contractions at different points in the total shoulder flexion range of motion (both with arms at the horizontal and with arms close to the sides) are necessary in order to work all muscle fibers to a similar extent.

Keuchle et al. (1997) reported that the moment arm length actually increases linearly between 80 and 65 degrees of shoulder flexion from approximately -33 mm to -40 mm but then plateaus between 50 and 40 degrees.

Comparing plank exercises, Schoenfeld et al. (2014) assessed the plank, the long lever plank (greater shoulder flexion), the plank with posterior pelvic tilt, and the long lever plank with posterior pelvic tilt.

He also recorded high - speed video footage to determine three - dimensional joint kinematics in their upper body such as shoulder flexion and elbow extension.

Resistance Band Shoulder Flexion is my favorite resistance band movement for the upper body, because of the shoulder mobility gained through the movement.

This is called shoulder flexion.

Although overall the pectoralis major may have a small shoulder flexion moment arm, this obscures the fact that the different heads have very different moment arm lengths.

There are differences between the two heads of the pectoralis major in how they produce shoulder flexion or extension in the scapular plane.

Gomo & Van den Tillaar (2015) further reported that the bench press performed with a narrow grip displayed significantly more horizontal shoulder flexion (arms further in front) compared to the middle and wide grip width at the start of the upward motion, point at minimum velocity and maximum velocity.

Ackland et al. (2008) showed that the inferior sternocostal fibers produce large moment arms throughout full shoulder flexion range of motion that is highest around the mid-range but remains high at 120 degrees (arms above head).

However, it does seem likely that the anterior deltoid moment arm length increases with shoulder flexion and peaks as the arm approaches or passes parallel.

Therefore, the middle deltoid may assist in stabilisation during shoulder flexion at greater joint range of motion.

The anterior deltoid is almost always trained by performing front raises, which involve shoulder flexion (raising the arms in front, to shoulder height).

In contrast, the close grip bench press benefits the clavicular head, probably because there is a larger shoulder flexion moment.

The clavicular head of the pectoralis major seems to perform shoulder flexion, while the inferior part of the sternocostal head of the pectoralis major seems to be a shoulder extensor (Ackland et al. 2008).

Keuchle et al. (1997) also reported that the posterior deltoid displayed a linear change in moment arm length that contributed to shoulder extension at 0 to 40 degrees and shoulder flexion from 40 to 100 degrees.

While the clavicular head assists in shoulder flexion, the sternal head assist in shoulder extension.

Ackland et al. (2008) reported that the peak moment arm length of the latissimus dorsi was displayed between 30 — 53 degrees of shoulder flexion depending on the muscle region measured.

Nevertheless, the muscle activity of the long head appears to be greatest when the shoulder is at around 90 degrees of shoulder flexion (as when performing a bench press).

The biceps and brachialis are responsible for giving the elbow its flexing movement, the biceps alone assist the supination of the wrist, while the short head plays a role in the shoulder flexion.

When the upper portion works by itself it can assist with bringing the shoulder straight forwards (shoulder flexion).

When I observe people coming to class with tightness in shoulder flexion, they will often bring their head forward.

Myers et al. (2005) compared a number of different rehabilitation exercises performed with elastic tubing including internal and external rotation, rowing and combinations of shoulder flexion, adduction and extension.

The pectoralis major (clavicular head) displays a moment arm length that peaks at 71 degrees of shoulder flexion (length = 53.7 mm) while the lowest moment arm length is displayed at 2.5 degrees of shoulder flexion (length = 9.6 mm).

Shoulder flexion involves lifting the arms out to shoulder height in front of the body, as shown in the picture below.

Upper body pressing exercises typically include elbow extension in addition to horizontal flexion — i.e. bench pressing — or shoulder flexion — i.e. shoulder pressing.

This is because, unlike the sternocostal head, the clavicular head contributes to shoulder flexion, which the incline bench press requires to a greater degree.

Key shoulder movements that involve the pectoralis major include shoulder horizontal adduction (moving the arms together in the transverse plane at shoulder height), shoulder adduction (moving the arms down to the sides, from shoulder height), shoulder scapular flexion or extension (moving the arms to or from shoulder height in the scapular plane in front of the body), and shoulder flexion or extension (moving the arms to or from shoulder height in front of the body).

The clavicular head assists in shoulder flexion, while the sternocostal head assists with shoulder extension.

These figures indicate that the pectoralis major (clavicular head) functions as a primary shoulder flexor between 25 and 120 degrees of shoulder flexion, with its greatest contribution to shoulder flexion occurring towards 120 degrees (arms above the head).

The pectoralis major (inferior sternocostal fibers) displays a moment arm length that peaks at 68 degrees of shoulder flexion (length = -22.2 mm) while the lowest moment arm length is displayed at 120 degrees (length = -12.4 mm).

In addition, only the sternocostal head assists with shoulder extension (returning the arm downwards to the anatomical position, which is the opposite of shoulder flexion).

As you can see from the chart below, the clavicular head of the pectoralis major displays the largest shoulder flexion muscle moment arm out of all parts of the pectoralis major, with a peak moment arm length of 53.7 mm at 71 degrees of shoulder flexion (arms just below parallel with the ground).

The pectoralis major has moment arms for several movements at the shoulder, including horizontal adduction (also called horizontal flexion), shoulder adduction (or abduction), shoulder flexion (or extension) in the scapular plane, shoulder flexion (or extension), and shoulder internal rotation (Keuchle et al 1997; Keuchle et al 1999; Ackland et al. 2008).

Ackland et al. (2008) showed that the pectoralis major (clavicular head) displayed a peak moment arm length of 30.2 mm at 120 degrees of shoulder flexion (arms above head) and a minimum moment arm length at 2.5 degrees (length = +3.1 mm) of shoulder scapular plane flexion.

For instance, a volleyball player might do some shoulder flexion and extension actions prior to a game.

If you sense any pressure in your neck or traps during the movement, look to address a lack of thoracic spine extension or shoulder flexion.

As explained above, the middle latissimus dorsi fibers display a peak moment arm length of -7.8 mm at 30 degrees of shoulder flexion (arms close to the body) and a minimum moment arm length of -0.7 mm at 98 degrees (arms above horizontal).

The moment arm length displays a plateau between 120 — 100 degrees of shoulder flexion.

In contrast, Ackland et al. (2008) reported the middle deltoid also displayed a peak moment arm length of only 12.2 mm at 120 degrees of shoulder flexion.