Most traditional forms of yoga only burn a modest 200 calories or so per hour. Before you drop-kick your mat in disgust, consider intensifying your workout to lose those last few pounds. Mix in some cardio sessions or try a more difficult class. Below are caloric breakdowns for various types of yoga. All estimates are based on a 140- (soon to be 135-) pound woman.

HATHA
The routine: A gentle form of yoga that focuses on basic postures and breathing techniques
The burn: 175 calories per hour
Same as: A slow walk

POWER YOGA
The routine: An Americanized version of Ashtanga yoga, similar to Vinyasa
The burn: 300 calories per hour
Same as: A brisk walk  

VINYASA
The routine: More intense than Hatha, poses are linked together in a fast, flowing sequence
The burn: 445 calories per hour
Same as: An hour of moderate bike riding  

BIKRAM and HOT YOGA
The routine: Class is comprised of 26 postures, each performed twice, in a studio heated to over 100 degrees
The burn: 636 calories per hour
Same as: An hour of jogging