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📍Unlock Your Pecs📍 💪 The pectoralis major is the large chest muscle that connects your chest bone (sternum) and collarbone (clavicle) to your upper arm bone (humerus). ➡️ Because we sit and slouch so often for computer work, driving, or school, the pecs often become shortened and tight, pulling the shoulders forward and contributing to that rounded posture many of us want to fix. 💡Pro tip: The pecs are easiest to mobilize and stretch when your shoulder is in extension, external rotation, and