Widely known as an authority on exercise and fitness issues as well as digital health and consumer behavior change, Blahnik has been a fitness expert for MSNBC.com and the Los Angeles Times and authored the book Full-Body Flexibility in 2004.

[1] Blahnik has produced and starred in a large number of fitness and workout videos and has consulted and represented a variety of prominent fitness equipment companies including Nike, Nautilus,[2] Bowflex, Schwinn[3] and Stairmaster.

[citation needed] He was a member of Gatorade's G Series Fit Team, a BOSU® Development Team member, the program creator/developer for Schwinn Indoor Cycling, and an Advisor for Equinox Fitness Clubs.

He was also a key expert and consultant for many of Nike's Digital Sport initiatives including the Nike+ FuelBand and Nike+ Kinect Training.

In 2019, Blahnik was selected as the recipient of the IDEA Jack LaLanne Award for Lifetime Achievement for making a significant and lasting contribution in the areas of health and fitness by promoting the benefits of exercise and healthy eating through his work in the media or public eye.