Sentences with phrase «peak pectoralis»

They reported no difference in peak pectoralis major muscle activity.

Not exact matches

Keuchle et al. (1997) showed that the pectoralis major moment arm peaked at 45 degrees of shoulder horizontal flexion while the smallest moment arm was found at 140 degrees (reaching across the body).

In contrast, the chart shows that the lower sternocostal head of the pectoralis major actually displays a shoulder extension peak moment arm of -9.3 mm at 98 degrees (arms just above parallel with the ground).

The pectoralis major (clavicular head) displays a peak moment arm (length = +30.2 mm) at 120 degrees (arms over head) and its lowest moment arm length of 2.5 degrees at +3.1 mm (Ackland et al., 2008).

Ackland et al. (2008) showed that the pectoralis major (superior sternocostal head) displayed a peak moment arm length for shoulder adduction at 41 degrees (length = +32.9 mm) and a minimum at 120 degrees (length = -17.7 mm), while the pectoralis major (inferior sternocostal head) displayed a peak at 64 degrees (length = +33.6 mm) and a minimum also at 120 degrees (length = -16.2.

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).

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).

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.

While the anterior deltoid has only the fourth largest peak moment arm length during shoulder flexion, the clavicular pectoralis major and posterior and anterior subscapularis have maximum moment arms lengths at moderate (71 degrees) and small (2.5 degrees) shoulder positions respectively.