ELIZABETH COHEN, CNN CORRESPONDENT (voice-over): Well, this may not be his lucky break, or hers, but one thing is for sure, fitness experts say cycle karaoke is invigorating, fast-paced and aggressive. Your vocal chords are put to work.</s>UNIDENTIFIED WOMAN: Well, it kind of takes your mind off what you're doing at the moment.</s>COHEN: Originated at Punch Fitness in Los Angeles, California some three years ago, cycle karaoke combines singing and indoor cycling, and now it's available in health clubs across the country.</s>UNIDENTIFIED WOMAN: It is a great motivator and the songs that we sing are songs that everybody knows, you know, kind of feel good. This is a really good way to stay aerobic with your workout because if you can talk and workout at the same time, it means that you're not going into your anaerobic threshold.</s>COHEN: Participants pick their favorite dance, disco or Motown hits...</s>UNIDENTIFIED WOMAN: We just put this, the words up on the screen and everybody sings while they write and it is difficult. I mean it's a little bit more of a cardiovascular workout. You're expending more calories. You're building cardiovascular endurance. You're building strength endurance. You're building muscular endurance and it's just a full, it's also a great fat burning class.</s>UNIDENTIFIED CLASS MEMBERS: It's so easy to fall in love.</s>COHEN: And it's a good excuse to sing while you get in shape. For "Feeling Fit," I'm Elizabeth Cohen.
Feeling Fit: Karaoke Cycling Exercises Vocal Chords