With all these arm movements, most of the rotator cuff muscles — like the teres minor or the infraspinatus — are acting like synergists.

通过所有这些手臂运动，大多数肩袖肌肉——如小圆肌或冈下肌——都像增效器一样发挥作用。

The third functional muscle group is your synergists, and they help the prime movers usually by either lending them a little extra oomph, or by stabilizing joints against dislocation.

第三个功能性肌肉群是你的增效剂，它们通常通过给原动机一点额外的活力来帮助它们，或者通过稳定关节防止脱臼。