Exercise shouldn’t be drudgery, although too often it is when we’re slogging on the treadmill or doing mindless laps in the pool. In the interest of combining exercise with an element of fun, the Los Angeles Athletic Club in downtown L.A. kicks off its “Move to a Movie” monthlong workout series that combines films with complementary themed workouts.
What is the difference between "in the interest of" and "in order to"? They seem similar in their definitions. Why does the writer use "in the interest of" here?
in the interest of (something):
In order to accomplish, improve, or advance something.
in order to:
For the purpose of