|XiT...Extreme Interval Training, 2nd Ed||Video|
|XiT...Extreme Interval Training, 2nd Ed||DVD||(DVD versions only)|
|XIT“Extreme Interval Training: 2nd edition||Online Test|
Helen Vanderburg is the owner of Heavens Fitness and Fusion-Fitness-Training. She is the 2005 IDEA Instructor of the Year, the 1996 IDEA Program Director of the Year, and a two-time Can-Fit-Pro Presenter of the Year. Helen holds a bachelor?s degree in kinesiology, is a past world champion in synchronized swimming and is a certified yoga and Pilates instructor. ... read more.