16/04/2026
🤓 What are the Teres Major and Minor Muscles? The teres major and teres minor are two distinct muscles located on the posterior (back) side of your shoulder. Although they share a name, they serve different functions and have unique attachments.
💪 Teres Major Functions:
1️⃣ Arm Adduction: The teres major's primary function is to adduct your arm, which means bringing it closer to your body's midline. This muscle assists in movements like pulling or hugging.
2️⃣ Arm Medial Rotation: It also contributes to the medial (inward) rotation of your arm, which is essential for various upper body actions, such as reaching behind your back or putting on a seatbelt.
💪 Teres Minor Functions:
1️⃣ Arm Lateral Rotation: The teres minor's primary role is to externally rotate your arm, turning it away from your body. This muscle is crucial for activities that involve throwing, reaching, and lifting.
2️⃣ Shoulder Stability: Both teres muscles play a role in stabilizing your shoulder joint, helping to maintain the proper positioning of the humerus (upper arm bone) within the glenoid cavity (shoulder socket).
🚴♂️ Everyday Applications: From carrying groceries to throwing a frisbee, the teres major and minor muscles are actively engaged in various daily activities, ensuring that your shoulder remains both mobile and stable.
🏋️ Fitness Focus: Fitness enthusiasts often target these muscles during workouts to enhance shoulder strength and mobility. Exercises like rows, latt pulldowns, and external rotation exercises can help strengthen the teres muscles.
❗️The muscle information provided is for general purposes only and not a substitute for professional advice. Consult a healthcare professional for personalized guidance. Reliance on this information is at your own risk, and we disclaim any liability for consequences.