Co-authored by Helen Ren e and Brian Sterling-Vete. Helen is an ISOfitness(TM) exercise specialist and competitive Bikini Fitness Athlete from the United States. She went from 40lbs overweight, to a size ZERO Bikini Fitness Athlete in just 8 months! Helen now teaches the ISOfitness(TM) system in video-led online workout routines, webinars, live seminars and corporate fitness workshops. Brian Sterling-Vete Ph.D. is a British author, Guinness World Record Holder, and martial arts instructor. As a veteran strength and fitness coach, Brian trained with, and coached his friend and 4 Times World's Strongest Man, Jon Pall Sigmarsson of Iceland in strength and the martial arts. Brian worked with BBC TV News and is a TV broadcaster with a non-nonsense, entertainingly politically incorrect, and direct approach to fitness and body shaping which gets results.