Stretch your legs
Definition 1 of 2
Pro Tip 1/3Physical Activity
Often used to suggest moving around to promote blood flow and reduce stiffness. 
After the long flight, she was eager to stretch her legs.
Pro Tip 2/3Long Periods
Commonly refers to taking a break after extended periods of inactivity. 
Let's pull over at the next rest area to stretch our legs.
Pro Tip 3/3Informal Suggestion
The phrase is a casual way to suggest a pause or interruption in an activity. 
We've been working for hours, how about stretching our legs?
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