It is actually a fairly intense form of yoga for many people as it is performed more vigorously than other forms of yoga and in a heated environment. Many people can find this form of yoga stressful in itself and realistically you should have a reasonable level of fitness before you get involved in core power yoga. People who perform core power yoga on a regular basis find the combination of strength and flexibility that it offers helps to raise their fitness level beyond that which they could achieve using other forms of exercise and all the while helping to reduce the levels of stress.
It also helps many people to become more focused in everything they do in their life as this is one of the aspects of core power yoga that the training brings with it. There is a version of yoga called Ashtanga that gives the basis for core power yoga. By strengthening the core area of the body in the lower back and the abdominal muscles it is very beneficial for many forms of sports as this is the central strength of the body that is required for almost every type of activity.
Building strength in this area gives a lot of support to the back and reduces a lot of back injuries that are common to many people. By performing the yoga in a heated environment it is thought that this helps to eliminate toxins from the body and it certainly is a fast way to build up a sweat.
While the poses are generally only held for a very short time a combination of one after the other helps to increase physical endurance.