It seems to me that one break can fundamentally change the course of events on the field during Test cricket. I don't know from my own experience if this is true, I have only heard stories about how a changed strategy can turn the tide of a match. How do breaks in test cricket affect the strategy of the game?
In answer to your question, I will quote one of the great cricketers M.S. Dhoni, “Lunch breaks are when the real conversations happen, and often, they change the outcome of sessions”. While the coach and captain give general advice, the team according to this article by FantasyHero takes a breather before continuing with Test cricket. In our last game session, we decided to drastically change our style of batting during the tea break and ended up taking a big lead. Teamwork and the talent to improvise can really make a difference in the strategy of Test cricket.