Lunch-hour workouts -- are those even a thing? Getting to the gym, changing clothes, trying to squeeze in a workout, only to get sweaty and need a shower so you can rush back to work; how are you supposed to do all of that in an hour (or less)?
I'm here to tell you it is, in fact, possible... just maybe not as described above. Rather than taking time to hit the gym, change, and shower afterward, you can finish an effective routine in just 30 minutes, all while wearing your normal work clothes.
The workout is very straightforward: a five-minute warm-up, a five-minute cool down, and four five-minute interval series. Rest is built into the program, but if you need more rest, choose three of the five-minute series and add a few minutes of extra rest between each series for a slightly easier workout.