One of my fave GX or group exercise is RPM, it is an indoor cycling work-out. Not just your typical cycling, which I usually got bored within less than 5 minutes. Here the instructor guides (or make) you cycle in different difficulties and intensities accompanied by the rhythm of a powerful music (thus the name RPM but could also indicate rate per minute). Usually takes 45 minutes (except for the Extreme classes which are 1 hour) and about 8 tracks (music), you can burn as much as 600 calories!
After my first time, the legs and butt were real sore. But as I progress, I notice my endurance building up and see small changes here and there (it should be big changes if only I could stick to my diet ).
BENEFITS OF RPM:
*Increase your cardiovascular fitness
*Burn fat
*Tone and shape your legs, hips, and butt
*Increase leg strength and muscular endurance without building bulk
*Burn up to 600 calories