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Low Back Strength Exercises on a Stability BallJackson Sayers, B.Sc. (Kinesiology), discusses how to increase lower back strength. Donald Trump blasts Putin—"What the hell happened to him?" ...
School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R.
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