Do you know the origins of the training programs or system you are using? Who designed it? What is their background? What are their credentials and experience? Beware of certifications disguised as qualifications. I value experience and academic credentials over commercial certifications. I am always wary if a person has too many letters after their name.
Is this a commercial venture that requires you to purchase equipment? Who are their sponsors? Who actually designs and writes the training program? If is a training center who actually implements the program- it is a qualified coach or an intern? Do they actually coach or do they just lead you through the workout?
Do the results of the program speak for themselves or are there a long list of celebrity and all star endorsers? Is it individual? How much does it cost? Are the claims for the program valid?