I workout hard, 5 days a week, I do cardio, weight lifting, exercise classes, etc. It can get grueling but it gets results too. But with that kind of schedule, you can get burned out too, and that's when injuries happen and you aren't getting your best workouts in.
The last time I took a vacation, my trainer thought I was crazy to workout during vacation. He said a vacation is a time to get away from everything, not just work. So I took his advice this year.