Spin or Spinning or group cycling class is interval training at its very
best: a calorie burning, high-intensity, muscle building workout that
offers the perfect way to train ... indoor cycling on a stationary bike
utilizes specially designed bikes that allow you to burn 400 -- 600
calories in a 40 minute workout. You are lead through a series of
phrases by varying your pace and the tension on the bike, from warm up
to high intensity, peak,and cool down. You will get a great cardio,
quadriceps and outer thigh muscle workout. Top it off with great
motivational music and instructors.