Is singing in tune with fitness?

Can you lose weight singing in the shower? I belt it out loud in the car, sing in a garage band and used to sing in a Chicago doo wop group called the Gonzo Vocal Barbarians. Our group's most famous moment arrived when we harmonized a shooby-doo-wop version of the National Anthem to open a Chicago Bulls game -- half the crowd cheered our creativity, half booed in protection of their sacred anthem. We made the paper. How about opera stars -- are they in better shape thanks to aria training?

One study found a group of opera singers 28 to 65 years old had better heart and lung function than nonsingers under 40. Another smaller study of opera singers revealed the respiratory system is highly responsive to even a short period of vocal calisthenics. But there may be a negative to singing. One study found singers' prolonged use of the lungs triggered an increase in the hormone leptin, which ultimately made the brain resistant to the hormone. Leptin resistance may result in weight gain.

Nothing on shower singing here. Beyond lifting the mic at the bar, I guess karaoke stars need to keep up their fitness workouts at the gym.