Blood vessels in the head tighten to stop the loss of body heat and then relax to let blood flow rise; that sudden rush of blood is what causes the headache.

头部的血管收紧以阻止身体热量的流失，然后放松让血液流动起来，血液的突然涌入是引起头痛的原因。

youdao

Exercise is the best way to relax mind and body.

运动是放松身心最好的方式。

youdao

Restorative yoga: This practice allows the body to fully relax by holding simple postures passively for extended periods of time.

养生瑜伽：保持一些简单姿势并达到一定时间，从而获得身体的完全放松。

youdao

Amazingly, Botox liberated many of these patients by temporarily cutting the connection between overactive neurons and muscle, allowing the body to relax a bit.

CNN: Paging Dr. Gupta Blog

Gravity takes over when you perform most exercises, like a dumbbell curl or a kettle bell swing, giving the body a chance to relax, says Rowdy Yates, a certified personal trainer and fitness manager at Crunch gym in New York City.

WSJ: What's Your Workout: From a Ball and Basket to a Stick and Some Ice

Of course, the retreats also allow plenty of downtime to relax and rejuvenate body and mind.

FORBES: Rosewood Little Dix Bay Expands Health and Wellness Retreats