Spinning

The gym I now go to is primarily focused on spinning done on the Real Ryders, rowing on Indo Rowers, TRX, etc. Newer types of equipment that have more real resistance. I LOVE the spinning. It easily burns 400+calories in a 45 minute workout (with 10 being warm-up) if you are being led by an instructor. Definitely tones legs and if you are doing the Real Ryders it does work your core more because it moves and you have to use resistance to stabilize the bike. On those bikes the red knob serves two purposes - it turns to add/subtract resistance from the bike and it also doubles as an emergency stop when you press straight down on it. Make sure you are putting enough resistance on when you use the bikes (Your hips shouldn't be "jumping" out of the saddle when you pedal - that's how our instructors explain it. Each bike is different but it usually takes me a good 3-4 full turns on the resistance to be on what they call a "flat road."). Also, your butt being sore is normal... The padded seats (they have seat covers in addition to pants - I find those are easier, and my gym actually supplies them) help a little, but you will still feel it. It will go away after a few weeks of sticking with it. However, if you do a really long ride (we have 90 minute rides), you might feel a little bit of it again or if you stop for a while and start back you will definitely feel it. It's totally worth it though! GREAT workout!

Its a great workout, your butt only hurts the frist class/week.
Than its not a problem.

Spinning can be a lot of fun - in our classes they play very energetic music very loud - so you get in a zone.
Definately buy padded bike shorts, and eventually your rear end will get used to it

How many calories can you burn in 1h workout? My instructor told me that it's between 600 and 700 calories. Can it be true?