The 4 elements of an effective break according to Daniel Pink:
1) Motion beats sitting. A walk restores you more than a chair.
2) Outside beats inside.
3) Breaks with people beat breaks alone, even for introverts.
4) Staring at your phone on your walk is not a break. Detach completely.
"They're part of our performance, not a deviation from the performance."
@DanielPink