Typically, anyone and everyone who brought the product after reading a Turbo Fire review or two is qualified enough to take on the program for the entirety of the 90 days. However, if you feel that you might not be able to cope with the intensity aspects of the program, then there is nothing to worry. The conception of each of the cardio workout sessions seen in the 10 DVDs was so done after taking all the prevailing factors into consideration.
As such, a person who is a habitual smoker or someone who has never exercised before will find that catching on with the rhythm of the program is no hard task, since it graduates from a basic level to more and more intense workouts as the days progress forward. If you just devote half an hour every day or two and take on whatever is thrown at you, then you will find yourself easily acclimatizing to the Turbo Fire intensity naturally.