It was a grueling two-day walk to the nearest emerops facility.
With grueling slowness, she drew nearer the shore.
She spent a grueling hour putting up the string of red lights in the kitchen and stepped back to admire her work.
However, if the grueling schedule you've set for yourself is starting to become something of a problem, asking yourself why you are doing it can actually help you think about the problem in a more creative way.
High school tryouts can be grueling, consisting of a tryout routine, dance and even intensive interviews to find out if a potential cheerleader has the "cheerful" personality required of this sport.