Extend your arm backward, keeping your elbow straight. Hold and slowly return.

保持你的肘关节伸直，维持几秒再慢慢回到起始位置。

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Return your left heel to the ground and simultaneously let your right elbow move back to your side as it comes down.

将左脚后跟踩回地面，同时右肘关节立即靠回身体右侧。

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Jenkins is likely to miss the entire Six Nations after surgery on his toe injury, but fellow prop Jones could return from his elbow problem within six weeks.

BBC: Wales' Warren Gatland questions Dylan Hartley's value

But upon his return from the Caribbean, he underwent elbow surgery.

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Swann is to return home for surgery on his troublesome elbow injury and will be replaced by Gareth Batty, 31, who has not played for England since 2006.

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