Spark has 10-minute office workout videos posted by Coach Nicole here on the site. There are also videos you can purchase that take you through 10 minute workouts. Science has proven that 3 sessions of 10 minutes a day is as effective as one session of 30 continuous minutes. Everybody has 10 minutes here and there throughout their day, and as Nike says "Right now, somebody busier than you is running."
Good luck, be well!