Spinning has many benefits, especially a high-calorie burn, but you'll want to avoid muscle imbalance. If Spinning is your main source of exercise, I recommend doing some resistance training workouts that include hamstring (back of thigh), buttock and inner-thigh exercises.
Sometimes people use Spinning as a generic term, but it is a registered trademark. There are also other programs that offer intense group sessions of stationary cycling. These include Studio Cycling, Power Pacing and Body Biking. All of them are great when taught by the right instructor.
iVillagers on Spinning
"I don't understand how women can do this workout; the seats on the bikes are so painful. I know when you get more advanced, you spend a lot of time off the saddle, but beginners need to be able to sit without feeling like there's steel being driven into their pelvis!" -- An iVillager
"I've just started spinning four to five days a week and it is the ultimate high of all the cardio workouts I've tried. I can already see results." -- An iVillager
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