AFAA Personal Trainer Certification Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the AFAA Personal Trainer Certification Exam. Engage with quizzes, flashcards, and multiple-choice questions. Prepare efficiently with hints and explanations to achieve certification success.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which muscles oppose the posterior deltoid?

Anterior and medial deltoids
Triceps
Hip adductors
Abdominals

The correct answer is: Anterior and medial deltoids

The anterior and medial deltoids are considered antagonistic to the posterior deltoid because they serve opposite functions during arm movement. The posterior deltoid is primarily responsible for shoulder extension and external rotation, while the anterior deltoid is involved in shoulder flexion and internal rotation. The medial deltoid assists with shoulder abduction. When the posterior deltoid contracts to pull the arm backward, the anterior deltoid must relax and vice versa. This relationship is part of the overall function of muscles in the shoulder complex, where the balance between opposing muscles is crucial for maintaining proper joint mechanics and function. Understanding these muscle dynamics is essential for personal trainers, as it informs exercise programming and helps prevent muscular imbalances.