agonist

When you bend your elbow, the biceps acts as the agonist and the triceps relaxes.

当你弯曲肘部时，肱二头肌充当主动肌，肱三头肌则放松。

用法提示：名词，指在某一动作中主动收缩的肌肉，常与拮抗肌相对。

During a squat, the glutes are the main agonists that drive the movement.

下蹲时，臀肌是带动动作的主要主动肌。

用法提示：这里用复数形式 agonists，表示多个主动肌。

The physical therapist asked me to identify the agonists in each leg exercise.

理疗师让我指出每项腿部练习中的主动肌。

用法提示：名词，指在运动中起主要作用的肌肉。