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Board of Directors

The American Council on Exercise’s diverse board of directors is comprised of distinguished leaders in the health and fitness industry who advise, govern and oversee policy and direction of the organization. This prominent panel provides valuable insight and collective expertise to support the organization’s mission and needs, and assists with the leadership and general promotion of ACE. These individuals share ACE’s dedication to the country’s health and well being, and commitment to enriching quality of life through safe and effective exercise.

See Also: Executive Team | Board of Directors | Industry Advisory Panel | Senior Consultants

Herb Flentye

Chair of the Board

For more than 10 years, Herb Flentye has been the president and chief executive officer of SPRI, a subsidiary of Gaiam, the leading manufacturer and distributor of rubberized resistance exercise products in the professional market. Flentye brings tremendous innovation and experience as an operating executive officer as an entrepreneur. Prior to joining SPRI, he worked for Tennis Corporation of America in finance and information systems and owned and operated an accounting and information solutions consulting firm.

Flentye has a bachelor’s degree in accounting from DePaul University.

“I am proud to be member of the ACE Board of Directors, an organization committed to enriching quality of life for all segments of society. At SPRI, it is our privilege to support the professionals that believe in and support that mission by inspiring and motivating the individuals they work with every day.”



Scott Murdoch, Ph.D., RD

Vice Chair

Scott Murdoch, Ph.D., R.D., is the co-founder and chief nutrition officer of NutriStyle, Inc., a web-based nutrition and fitness program. He has 20 years of academic teaching, research and clinical experiences, which have consistently focused on human nutrition and physical performance, with particular emphasis on both acute and chronic adaptations to various eating and activity patterns.

As a physical activity enthusiast, he has competed in over 90 triathlons.

Murdoch received his bachelor of science degree in health fitness/wellness programming from Springfield College, MA, his master’s degree in exercise physiology from the University of South Carolina at Columbia, and his Ph.D. in nutrition and human performance from the University of North Carolina at Greensboro.



Kimberly Wells


Kimberly Wells is a senior international trade specialist with the U.S. Department of Commerce, where she specializes in helping the U.S. aerospace industry improve its international competitiveness. She has helped to develop numerous presidential policies impacting the health of that industry, and works closely with the Departments of Defense and State, the White House and Congress to develop foreign economic policies that strengthen the aerospace industry. Wells is also the Chair of the Department of Commerce’s Occupational Health Organization, which makes fitness facilities and programs available to over 3,000 department employees in Washington, D.C.



Samantha Lincoln


Samantha Lincoln is a finance executive with over 15 years of experience in mergers and acquisitions. Currently Samantha serves as Director of Business Development for Pacific Pulmonary Services, an acquisitive California-based respiratory services company serving oxygen and sleep therapy patients throughout the country. Previously she worked in investment banking and private equity investing for various firms in California and Cleveland, Ohio including McDonald Investments, Key Bank, CapitalWorks and Instream Partners. Samantha holds a Bachelor of Arts in Economics and Political Science from Yale University. She resides in Erie, PA with her husband and two young children, where she enjoys tennis, windsurfing and gourmet cooking.



Chris Freytag

Director Emeritus

Chris Freytag is well-known on a national level as a fitness expert and contributing editor for Prevention magazine. Her most recent book, Move to Lose, offers practical tips, information and guidance for keeping a positive mindset in incorporating healthy eating habits and exercise into everyday life. Her workouts are featured in Prevention Fitness Systems’ latest DVD’s, as well as in many others over the past 19 years. Freytag is an ACE-certified personal trainer, ACE-certified Group Fitness Instructor and an ACE-certified Health Coach.



Asahel "Ash" E. Hayes, Ed.D.

Emeritus Historian

A physical fitness and sports consultant in San Marcos, Calif., Asahel "Ash" E. Hayes held appointments under former U.S. presidents Gerald Ford and Ronald Reagan during which he led national physical fitness and sports programs. He served as executive director, director of sports administration and director of federal/state relations on the President’s Council on Physical Fitness and Sports in Washington, D.C., throughout the 1970’s and 80’s. Hayes also had a distinguished career within the San Diego Unified School District working as a teacher, coach, department head, athletic director and district administrator of health, physical education and athletics.

Hayes earned his doctorate in education and a master’s degree in physical education/exercise science from the University of California, Los Angeles.

“It is an honor and privilege to be a part of the commitment of the American Council on Exercise in providing accurate information about exercise and physical fitness for the public and training programs for exercise leaders.”

Celebrating more than Sixty Years of Service



John Breslin, Ph.D.

John Breslin is a tenured lecturer in the School of Engineering and Informatics at the National University of Ireland Galway. He teaches undergraduate students in electronic, computer, and sports and exercise engineering, and serves as a leader of the Unit for Social Software at DERI, the world’s premier Semantic Web research institute.

Breslin is co-author of the book, "The Social Semantic Web," and helped create the SIOC Semantic Web framework used by thousands of websites. He is perhaps best known for co-founding and directing, Ireland’s largest discussion website, and its spinoff classified ads site. His work has garnered two IIA Net Visionary awards.

Breslin also co-founded the U.S.-based company StreamGlider Inc., a real-time streaming newsreader that can be privately labeled for publishers on tablets, alongside Nova Spivack and Bill McDaniel. He also set up Technology Voice, a Web publisher that covers emerging technologies in long-form articles. Breslin is an advisor to CrowdGather Inc., a forum network based in Los Angeles, and Dot-Irish LLC, an applicant for the .irish top-level domain.



John Ellis

John is the co-founder and chief executive officer for Attune Health Management, a comprehensive health management service and online/mobile platform that allow companies, individuals, and communities alike grow to be healthier, happier and more productive. John recently served as chief information officer for Health Fitness Corporation, after Health Fitness had acquired HealthCalc.Net Inc. (HCN) in late 2005. At HCN, John was a co-founder and the company's chief executive officer. He has served as senior specialist with Perot Systems Corp., where he led the successful design and development of large-scale software projects. John also has served as vice president of information technology and director of product development at People Karch International (PKI Software), a health and fitness software development and services firm. He has been involved in software application design for the health management industry for over 20 years.

He is a graduate of The Citadel (Charleston, SC) earning a bachelor of science in physical education. He and his wife split their time between Dallas, Texas and Sedona, Arizona, where they enjoy trail running/hiking, fly-fishing and cooking.



Shannon Fable

Shannon Fable, director of exercise programming at Anytime Fitness LLC, was named the 2006 ACE Group Fitness Instructor of the Year and the 2013 IDEA Fitness Instructor of the Year. As founder and CEO of Sunshine Fitness Resources and owner of Balletone and GroupEx Pro, Shannon puts her 16 years of experience in the group-fitness realm to work in a variety of ways.

She has served as a contributing author for the ACE Group Fitness Instructor and ACSM Group Exercise Instructor manuals, and she has starred in more than 25 fitness videos. In addition to serving as an international presenter at numerous industry educational events, she is also a program developer for several well-known fitness companies including Schwinn, BOSU®, Power Systems and ACE.

Shannon holds multiple certifications from ACE and AFAA. She’s also a certified Book Yourself Solid® Business Coach interested in helping fitness professionals navigate the industry and find their place.



Cindy Ratzlaff

Cindy Ratzlaff was named to the prestigious Marketing 50 by Advertising Age for her award-winning launch of “The South Beach Diet,” a worldwide bestseller. She managed an international publishing program for the multi-million dollar brand and advised 36 international publishing partners, who published more than 23 million copies of the South Beach Diet books.

As a health, fitness and diet brand consultant, Ratzlaff has worked with Kraft Foods, Curves International, Waterfront Media, Meredith Corporation and Rodale Inc., on consumer-facing communications for brand growth. Her expertise in building communities via social media led to recognition as one of the “20 Best Branded Women on Twitter” by Forbes and one of the “Most Influential Women Tweeting about Entrepreneurship” by Forbes Woman.

Ratzlaff is a frequent contributor to Business Insider, and her essays on happiness have appeared on, and A frequent speaker on building social communities and the art of happiness, she has appeared on Good Morning America and The Today Show, among others.



Manuel Rodriguez

Manuel Rodriguez is vice president of marketing, brand and marketing services, for Reliant Energy, an electricity provider in Houston, Tx. Before joining Reliant, Rodriguez served as senior director of marketing for Benicar, a product for hypertension, at Forest Laboratories in New York City. There, he led Benicar to become the third largest and fastest growing Angiotensin II Receptor Blocker (ARB) with annual sales of over $800 million and a market share of over 15 percent. Previously, he worked as director, strategy and business planning, for Plavix and director, consumer marketing, for Pargluva at Bristol-Myers Squibb Co. Rodriguez was responsible for fortifying the Plavix and Pargluva value proposition by developing an overall strategic approach and messaging across payer, consumer and physician segments. He has also worked on major consumer marketing efforts for healthcare products with Abbot Laboratories, Schering-Plough and Johnson & Johnson.



Michele Stanten

Michele Stanten has been motivating people to be more active for the past 20 years. As the former Fitness Director of Prevention magazine, she created a marathon walking program and coached thousands of readers to walk full and half marathons across the country. Stanten is the author of Firm Up in 3 Weeks and Walk Off Weight and has produced and appeared in more than a dozen exercise DVDs. She is also an ACE-certified Group Fitness Instructor.

Stanten has bachelor’s degrees in magazine journalism and English from Syracuse University.

“I am honored to be a board member of ACE, an organization that is a leader in promoting physical activity, and look forward to working with them to help even more people lead healthy, active lives.”



Nancey Trevanian Tsai, M.D.

Nancey Trevanian Tsai, M.D. is Assistant Professor of Neurosurgery at the Medical University of South Carolina (MUSC) having commenced her training in Orthopaedic Surgery at Louisiana State University and completing her residency in Physical Medicine and Rehabiliation at Stanford University. She has been an ACE-certified Personal Trainer and fitness advocate since 1996.



Elliot Turrini, J.D.

Elliot Turrini is chief executive officer and founder of CollaborativeHealth, an integrated media and services business dedicated to helping people live happier, healthier, longer and stronger. He is also an active member on ICG’s advisory board. Turrini’s past positions include assisting with strategy, finance, execution and legal issues as executive vice president for API Systems, Inc., a 300 employee IT consulting and services firm. At McElroy, Deutsch, Mulvaney & Carpenter, LLP, he focused on intellectual property, information security, cyberlaw and privacy issues. Turrini also served as Federal Prosecutor for the U.S. Attorney’s Office, District of New Jersey.