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곽시탈·Lying Barbell Tricep Extension·1y agoIf you extend your arm back past your forehead and isolate it, while lowering your elbow with your forehead, then spread and straighten your elbow, it will be the inner side.
If you extend your arm back past your forehead and isolate it, while lowering your elbow with your forehead, then spread and straighten your elbow, it will be the inner side.