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.
In general, it seems that compound exercises that include shoulder horizontal flexion feature as the best exercises for creating
overall pectoralis major activity.
Not exact matches
The bench press targets the
overall chest region during your chest workout with the
pectoralis major as the primary mover in this exercise.
The moment arm lengths of the
pectoralis major change considerably depending on (1) where in the
overall joint range of motion they are measured, and (2) which part of the muscle is measured (upper, middle, or lower).
Overall, the data indicate that grip widths > 100 % of shoulder (acromial) width produce superior but similar
pectoralis major sternocostal head muscle activity.
Overall, research indicates that the free - weight and machine bench press produce very similar levels of
pectoralis major EMG amplitude and therefore either will train the muscle effectively.
In contrast, the
pectoralis major
overall has a small extension moment arm length, making it a weak contributor to movement in the opposite direction, along with the latissimus dorsi.