Sentences with phrase «shoulder abduction»

As described above, the inferior fibers of the latissimus dorsi muscle display a peak moment arm length at 71 degrees of shoulder abduction of -38.1 mm and a minimum moment arm length at 10 degrees of -3.3 mm.

Jagessar (thesis) investigated the effect of differences in shoulder abduction angle (50, 70 or 90 degrees), scapula position (neutral or retracted), and lower back position (flat, neutral arch, arched) during the bench press.

It's mostly involved in shoulder abduction when the shoulder is internally rotated.

They report that the middle trapezius displayed its maximum muscle activity during the prone reverse fly at 135 degrees of shoulder abduction with external rotation (101 % of MVC), followed by the prone reverse fly with external rotation (87 % of MVC).

Grip width affects peak shoulder abduction angles.

Nevertheless, both parts of the sternocostal head display similar moment arm length to joint range of motion curves that appear as a bell - curve shape that peaks near the middle of shoulder abduction range of motion.

It's most important job is shoulder abduction when the shoulder is externally rotated.

Ackland et al. (2008) reported the anterior and middle deltoid display similarly large peak shoulder abduction moment arm lengths (anterior = 30.2 mm; middle = 29.1 mm), while the posterior deltoid displayed a peak shoulder adduction moment arm length of -15.9 mm.

For example, as you move the dumbbells higher overhead and begin to rotate the forearms, the upper arms shift out to the sides, engaging shoulder abduction which incorporates the lateral delts, while the triceps assist elbow extension.

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

We believe that the hand - on - top position initiates early shoulder abduction while delaying humeral external rotation because when the forearm is pronated, the humerus remains internally rotated.

Senta, go ahead and work hip extensions in the plank position, knee drives, horizontal shoulder abduction, mountain climbers while working that plank position for a little variety.

This is likely due to the vertical displacement of the bar at the start of the sticking point and resulting shoulder abduction and elbow flexion angles, and therefore, the sticking region of unsuccessful attempts starts earlier in the ascending phase compared with successful lifts.

Grip width affects the shoulder angle during the sticking region in the bench press, where shoulder abduction angle is more acute and flexion angle is greater at the start of the sticking region using a narrow grip compared to medium and wide grip widths.

From a base of 1,000 elderly men and women, Bassey et al. (1989) showed that shoulder abduction decreased gradually and consistently with age and was about 25 % less in these elderly subjects compared with norms for a younger population.

In contrast, the subscapularis only displays extended sarcomeres at maximum shoulder abduction and external rotation, thereby stabilising the shoulder joint in an opposite position (Ward et al. 2006).

Similarly, the middle deltoid had the greatest moment arm to produce shoulder abduction in the frontal plane (Browna et al. 2007).

They report that the moment arm length changed between 100 and 40 degrees of shoulder abduction from approximately -30.0 to -43.0 mm.

They report that the lower trapezius displayed its maximum muscle activity during the prone reverse fly at 135 degrees of shoulder abduction with external rotation (97 % of MVC), followed by the prone reverse fly (79 % of MVC).

Assessing the effect of grip width, Gomo & Van den Tillaar (2015) explored the effect of narrow, medium and wide grip widths on the peak shoulder abduction angle during the sticking region.

There's another test you can do to assess the status of the supraspinatus, one of the four small rotator cuff muscles which runs along the top of the shoulder blade and inserts via the tendon at the top of the arm or humerus bone, and is involved in shoulder abduction.

They found that the upper trapezius displays its maximum muscle activity during the shoulder shrug (119 % MVC), followed by the prone reverse fly at 135 degrees of shoulder abduction with external rotation (79 % of MVC), and the «full can» exercise above 120 degrees flexion (79 % of MVC).

The bench press grip width appears to affect peak shoulder abduction and horizontal flexion angles that correspond to key regions in the bench press, such as the sticking region.

-- The arms are raised with a shoulder abduction (Lateral movement away from the midline of the body) instead of rotation.

The anterior head is mainly involved in shoulder abduction, for example during lateral raises, but it also works together with the subscapularis and lats to internally rotate the humerus bone.

The middle trapezius is highly active during retraction exercises, while the lower trapezius is highly active in shoulder abduction or flexion exercises with the arm at or above horizontal.

It appears that relative load and shoulder abduction (coronal plane) affect upper trapezius muscle activity, while load - type appears to have no affect.

The middle deltoid is often trained by performing lateral raises, which involve shoulder abduction (raising the arms out to the sides, to shoulder height).

In the sticking region, grip width affects elbow flexion and shoulder abduction angles.

Shoulder abduction angle is more acute at the start of the sticking region when using a narrow grip width.

They reported no difference in the shoulder abduction angle at the point of minimal velocity of approximately 65 degrees.

Shoulder abduction involves lifting the arms out to shoulder height at the sides of the body, as shown in the picture below.

Shoulder abduction angles are more acute in the narrow grip bench press.

Shoulder abduction angles are more acute when performing the narrow grip bench press.

The moment arm length increases gradually from 90 degrees (arms out to the sides) to approximately 40 degrees of shoulder abduction, where it remains high until 0 degrees (arms close to the sides of the body).

Using a wide or narrow grip width causes differences in the shoulder abduction angle, which are probably what leads to the stress being placed on different parts of the pectoralis major muscle.

So the clavicular head of the pectoralis major seems only to assist in shoulder abduction and then mainly only above 40 degrees, peaking at 120 degrees (arms above the head), as is shown in the following chart below.

Ackland et al. (2008) showed that the pectoralis major (clavicular head) displayed a peak moment arm length at 120 degrees of shoulder abduction (length = +11.2 mm), and a minimum moment arm length at 2.5 degrees of shoulder abduction (length = -3.0 mm).

Further investigation by Ackland et al. (2008) showed specifically that the superior and inferior sternocostal head produce large moment arms throughout full shoulder abduction range of motion that is highest around the mid-range but is high throughout the whole shoulder abduction range of motion between 0 (arms by the sides) to 120 degrees (arms above the head).

Reinold et al. (2004) found similar levels (88 %) of posterior deltoid muscle activity during the prone horizontal abduction at 100 degrees of shoulder abduction with external rotation.

They reported that the moment arm length linearly increases between 120 degrees and between 80 — 60 degrees, where a shorter plateau is displayed, before a linear decrease in moment arm length as the shoulder moves towards 0 degrees of shoulder abduction.

They reported that the moment arm length is unchanged between 90 — 55 degrees of shoulder abduction, displaying a moment arm length of approximately -38.0 to -40.0 mm.

The moment arm length increases between 0 degrees and 70 degrees of shoulder abduction.

They report that the highest muscle activity was displayed in the frontal plane at 60 degrees of shoulder abduction (90.5 %), while overall muscle activity tended to be greater at all planes of motion at 60 degrees.

While the latissimus dorsi displays its peak moment arm at approximately 64 to 71 degrees, it appears that the muscle displays its greatest force producing potential when the arm is mid-range of shoulder abduction and the relationship between the moment arm length and the joint angle resembles a bell - curve.