While traveling to the spa's remote location could be hectic, visitors to the spa more than made up for the stress by unwinding in a supremely Pacific environment.
While doing his difficult homework, the student more than made up for his effort by relaxing in his living room afterwards.
While here is not during, it means: although
The main difficulty for an ELLer is the expression: ** more than make up for something**.
That phrase has two parts:
1) to make up for something = an idiom which means to compensate for something, make a negative into something neutral.
Your apology to me **makes up for your being rude to me**. [neutralizes the rudeness]
2) more than make up for something, goes a step further.
Your apology to me **more than makes up for your being rude to me**. [Here the apology goes further than neutralizing the rudeness, it makes the situation positive.]
These types of idioms (make up for something) need to be learned by heart. It is these idioms that make English so tricky.