Understanding our posterior chain (back body). I work with many clients weekly on posture and gaining back strength to help with posture. As we age we loose range of motion, flexibility and strength in our backs! It is very important to understand the mechanics of back exercises and how important form is in performing these exercises. I have found a video by Charles Poliquin on 2 good strength exercises! The pictures below will help you understand the muscle anatomy of these exercises.
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Have a wonderful day and keep lifting those weights.