Traditional exercises like sit-ups, press-ups and pull-ups are great for strengthening the body, providing you do them properly.
像仰卧起坐、俯卧撑和引体向上这些传统运动，只要你做得正确，就有利于强身健体。
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Next, take the head gently in two hands and press it very slightly downward (do not pull), asking the mother to push at the same time, to deliver the front shoulder.
Next, take the head gently in two hands and press it very slightly downward (do not pull), pushing the baby out at the same time, to deliver the front shoulder.