Spruce founded the Apex Fitness Group in 1994 with the vision of creating an exercise and nutrition program that put scientific fact and theory into practice for the benefit of health-club members. The Apex Fitness System is currently used in 700 health clubs worldwide and represents an interactive, educational program with hands-on applications, individualized to help health club members achieve their fitness goals.

A nationally recognized nutrition and fitness expert, Spruce delivers more than 150 lectures annually on fitness-related topics. For the past 20 years, he has worked with cosmetic athletes in bodybuilding and fitness competitions and celebrities in sport and entertainment endeavors. He has been a featured speaker on more than 300 radio and television talk shows. He hosted a San Francisco television show focused on health, fitness and exercise topics.

An award-winning athlete and bodybuilding champion, Spruce held the titles for Mr. Western USA and Mr. Western America, was the first runner-up in the Mr. USA contest and was a standout athlete on championship basketball and football teams.

Spruce is the author of An Evaluation of Fitness-Enhancing Supplements and holds a health and fitness teaching credential from the State of California. In addition, he has been featured in the Who's Who Registry of Top Executives and Successful Businesses. Current research interests include nutritional science/dietetics, sports nutrition, exercise, bodybuilding, resistance training, fat reduction, body composition and performance technology.