The Challenge is set...


Welcome to the Challenge Fit AZ site; home of Sean Neff's Challenge Fit AZ and Freda Neff's Weigh of Life Nutrition.  We strive to be your one stop shop for all of your certified fitness and nutritional needs.  Specializing in those who need a deeper connection with their health and wellness professionals; getting great results with those who have special needs, improving the skills and fitness of young athletes,  fulfilling the needs of busy executives as well as the confidence and shapes of brides and grooms to be. We would love to take care of you as we take you to the next level and beyond. 

Sean Neff/Owner

Sean Neff specializes in Rehabilitative Fitness/Wellness, youth mentorship through fitness as well as full family fitness and Executive Wellness.  Sean was a Westside Los Angeles in-home personal training staple for over a decade.  Beginning as a member of Angela Parker's fabulous Body Inspired Fitness team in 2004 as the former head of Men's fitness for BIF and the leader of the well-received Beachside Sports Cardio classes; Sean has had quite a following along with tremendous amounts of word of mouth referrals for private fitness training for people from ages six to ninety-two.  With over a dozen certifications (and more on the way each year), this certified Master Health and Wellness Coach takes great pride in the fact that his clients often stay with him for years at a time and absolutely love their results!  From individual instruction with clients challenged by asthma, obesity, Cerebral Palsy, post-surgery needs, and Asperger's Syndrome to full competitive team athletic training up to the University level; Sean continues to leave his personalized imprint on the fitness levels of all who he instructs.  

Freda Neff, MS CN

Freda Neff is a certified Nutritionist through the National Exercise and Sports Trainer Association (NESTA) as a Lifestyle and Weight Management Specialist and is also a National Health Educators (NHE) Certified Fitness Nutritionist.    She also has a Masters of Science degree in Health and Nutrition Education through Hawthorn University.  Freda loves walking her clients through each step of how to make positive changes in their own nutritional plans with a wonderfully motivational technique.  You can contact her directly at and also peruse her nutrition website at




5:30am - 7pm


8:30am - 3pm



Based in the Southeast Valley of Phoenix, AZ.  Including Gilbert, Chandler, Ahwatukee, Queen Creek, and Mesa.




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