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Sit up straight on the edge of your chair. Grasp a full water bottle or something else with some weight in on hand. Your upper arm should stay firm to...Read more
Sit up straight on the edge of your chair. Grasp a full water bottle or something else with some weight in on hand. Your upper arm should stay firm to your upper body. Only your elbow should bend to raise and lower the water bottle. Repeat this 10 to 15 times and change arms.
