#1 Don’t be afraid to ask about the beginner’s classes
#2 Adjust your bike settings to suit your height and build
#3 Pay attention to the orientation of your knees and feet
#4 Maintain a challenging gear or resistance level
#5 Take a day or two properly stretch and rest
For details - http://preen.inquirer.net/17469/5-ways-to-avoid-major-injuries-during-an-indoor-cycling-class
#2 Adjust your bike settings to suit your height and build
#3 Pay attention to the orientation of your knees and feet
#4 Maintain a challenging gear or resistance level
#5 Take a day or two properly stretch and rest
For details - http://preen.inquirer.net/17469/5-ways-to-avoid-major-injuries-during-an-indoor-cycling-class