What is an antonym of "luxurious laziness"? Here is the context:
Going to school by a 20-minute bicycle journey is [[antonym]], while going to school by a 15-minute motorcycle ride is luxurious laziness.
Why is it a luxurious laziness? Luxurious because a motorcycle is costly. Laziness because the time difference is almost insignificant, and by riding a bicycle you're also building up your health.