About Us

Leanness Lifestyle University was founded in 1999 by David Greenwalt. As an early adopter of the Internet, David saw the potential of two-way real-time communication unique to this form of media.

Leanness Lifestyle was launched from inception with a science-based educational framework. Having worked directly with clients since 1986, David had already realized that “calories in calories out” weight loss models didn’t work.

Telling people their weight was all their fault and all they needed to do was “eat less and exercise more” was, and is, the standard, and a grossly ineffective approach.

David knew the only real way to help people lose fat, keep muscle, and then keep the fat off permanently was to educate and provide a truly personal touch. Leanness Lifestyle was the first online program to couple nutrition, exercise and emotional education with accountability, motivation, and personal support.

After authoring the comprehensive body-transformation book called “The Leanness Lifestyle” and conducting a lot of research David realized that what he envisioned providing clients who wanted to transform their bodies simply didn’t exist. But to have what he wanted produced, even in 1998-1999, was going to cost at least $25,000 to start and no less than $10-$20,000 per month for maintenance and upgrades. That simply wasn’t in the budget.

So David worked tirelessly for 18 months creating his vision. He self-taught HTML, Javascript and HTMLOS programming languages during the time when dial-up Internet connection was the standard. The first iteration called “Club Lifestyle” was born in 1999.

Early on Club Lifestyle offered clients very basic software programmed by David that allowed clients to track their exercise, nutrition and weight goals. David also programmed the software for group discussion and private messaging for discrete interaction directly with David.

Privacy and anonymity have been important elements of the program since inception. These are just a few of the many benefits of online interaction.


Many evolutions and advancements have occurred since 1999 and continue today.

David is a Certified Wellness Coach earning his certification from the leading authority of wellness training—WellCoach™. Today, now more befitting of the original and continued education mindset, the website is called Leanness Lifestyle University. It’s often abbreviated as LLU or LL University. LLU provides a robust online campus with tools that lead the field in recording, tracking, reporting and scoring the behaviors optimal for successful weight-management. LLU offers a mobile APP for the Android and Apple platforms.

As A Lifestyle 180 Student You Get Not Only David Greenwalt But You Also Get Several Experienced Graduate Assistants Who Have ALL Traveled the Road from Fat to Fit.

Tom Roehl

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Tom has been a student of LLU since 1998, near the inception of the program. He’s also one of my best friends now. He’s a graduate of our course and has successfully maintained his weight loss for more than 10 years. Tom has been instrumental in helping me develop a number of the tools and apps our students use today. He’s a Certified Personal Trainer, a certified top-notch Certified Wellness Coach and you will enjoy him as one of your Coaches very much.

I’m 56 and I’ve been with David and LLU since 1998, before Leanness Lifestyle actually existed so I’ve been honored to be with him for a long, long time and we’ve gotten to know each other and I’m very proud to call him a best friend.

I started Leanness Lifestyle at 260 pounds and size 38-40 pants. Today my everyday feel-good weight is about 195. During the summer months I may lose another 10 as I’m a singer and I feel better a bit lighter when performing not only in front of crowds but also in the heat.

I’ve been happily married for over 36 years to the soul mate of my life Terri, who was my inspiration when I first started and I got into physical fitness again. I was in it when I was younger and got out of it, and I was always interested in physical culture all my life but it changed a lot.

I went from a very skinny person when I was a kid who couldn’t gain weight to a very heavy person in my 30s. Terri one day just decided to come to me and ask me for my help losing weight because she knew I was into fitness when I was younger. She went from a Size 14 to Size 2 petite where she remains today and she’s maintained that for over 13 years now and counting. I’m really proud of her and all.

She was my inspiration, she led by quiet example. Through my own journey Dave has been there every single step of the way. He has been my mentor and coach all through it. In 2002 I participated in a bodybuilding competition and won the Masters division. It was an amazing experience especially having so many of my Leanness Lifestyle friends there to cheer me on.

Today I’m a certified personal trainer and certified wellness coach but my full-time is as a printing manager for a department within the county of Milwaukee Wisconsin. I’ve coached almost every single course that David has offered. I’ve been honored to be a coach and have been honored to help him develop and create and beta-test tools that you’re all using now, so I’m very familiar with the system.

More than that, I just want to let you know that you are in the very best hands that you could be in. You have an incredible opportunity right now in your life, make every bit of it count because you’ve got the very best coach and I can tell you that from personal experience, both as a friend and as a mentor, and as a teacher.

Trust me, what you’ll learn is way out ahead of anything that anybody else is. If you want to change your body and your life, now is the time to do it because this is the moment. This is your time. It’s a unique opportunity and it’s a special one that makes it something you can look back at and say that this was a time that you took control of your life and you decided to make a change and it lasted, and this is when it happened.

Mary Greenwalt R.N.

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Mary was top student in her Lifestyle 180 course many years ago now. She’s an amazing soul, bright, practical, compassionate and professional. She’s maintained a 60-pound loss for seven years now! Beyond knowing LLU she deeply understands our philosophies and principles. In her everyday work she is a supervisor and a professional. The support you get from Mary will always leave you knowing she really gets it, she cares and she’s a true pro. Mary is also my wife!

My name is Mary Greenwalt and I’m a registered nurse. I work as a supervisor for an emergency department at a Level 1 trauma center that sees about 75,000 patients a year. I’m 58 years old and I joined LLU in July 2005 weighing about 204 lbs then at 5’4’’.

In those days, during my hour drive home from work, I knew exactly when to make a phone call to Domino’s Pizza so by the time I walked in the door, took the dog out to eat delivery was there, and my routine order was a large cheeseburger pizza with cheesy bread pizza sticks and a 2-litre of Pepsi. I assure you, I ate most of that in the evening, and what I didn’t finish off I ate for breakfast in the car.

I absolutely did my eating in private. That’s about 7 hours worth of exercise by the way, I calculated that last year.

July 2005, I was starting a diet every Monday and I wasn’t even making it through Tuesday until I found LL. I think I was attracted to LL originally because of David’s posts which I found very evidence based. I started in July. By the time I did Lifestyle 180 in October I’d lost 17 lbs and that October Lifestyle 180, I was actually the top student.

By April, I was down to 143 lbs and I looked good, but I didn’t want to look just good. I was approaching my 50th birthday and for my 50th birthday, for once in my life, I wanted to look fantastic. Coach came up with this idea of a body building show for me and I’ve been an athlete in college, so I went with it.

I saw my first body building show that summer of 2006 and my second one that I saw was November and actually I was on stage for it. I came on stage at 121 lbs and 7% body fat and at that point, I was wearing a size 0, I could run 6 miles in an hour at age 50, I was squatting 180 lbs and I felt fantastic.

I did actually win the Masters Overall and then other trophies in that show and I’ve competed five times since because I use bodybuilding as a tool to stay lean and to continue the lifestyle. It keeps me focused on what I want, which is a lean body and a leanness lifestyle, nutritionally fit, actively fit and emotionally fit.

I’ve learned that winning is about behaviors that are compatible with my vision of my best self, the best person I can be. Like most weight fighters, I’ve had relapses where my weight has come up but with coach’s help I’ve never gone back to that heavy weight I was before.

Like Coach Tom, I’ve helped with multiple courses at LLU and I do it because each time the people who step forward, who say, “I want more from life,” inspire me to continue my own journey. So again, I’m really honored to be coaching Lifestyle 180 also.

Robin Bergstrom


Robin was a very early user and graduate of one of my first courses. Don’t let her 4’11” stature fool you. She’s got great spirit and spunk and won’t be letting you get away with any unintentional weaseling. In her professional life she’s an NASM Certified Personal Trainer for the Navy at the Great Lakes Naval base. She knows LLU backward and forward and has Coached for several years now.

I found Leanness Lifestyle in 2003 (crap that’s 10 years!!) At the time I weighed 135ish lbs. In January of 2004 there was a coursed called “DIVA intensive” that I joined and got down to 116lbs in 8wks.

I maintained that weight until in 2007 when Coach challenged me to take it a step further, I wasn’t 100% happy at 116 so I took him up on the challenge. I got down to just about 105lbs or so and in the summer of 2008 I had some awesome after pictures done with my LL Best friends in downtown Chicago (pics can be found on Facebook). I am my happiest right around 110lbs.

I have been married for almost 26 years to the most amazing man ever who, in 2012, made his own amazing transformation using LLU and Lifestyle 180. We have three awesome kids.

Marilyn Groce


Marilyn is a master of the LLU system, a graduate of the program, to-the-point, no-nonsense and cares deeply about each and every student. At some point you will get your food logs reviewed if you become a student. Marilyn is our resident Grand Master reviewer – she catches most everything and she’s going to let you know where you need to improve. You will enjoy her caring yet direct demeanor.

Hi, I’m Marilyn and I’m in my early 60s, I live in Las Vegas after living in Los Angeles for decades prior. I’ve been married for over 40 years! I have two children and four grandchildren.

I came to Leanness Lifestyle in 2004. It was kind of an accident. I was searching around again for a way to manage my weight, which was on the rise. I thought, “Well, this looks pretty good. I’ll just jump in for a month and learn everything. I can then jump back out and live happily ever after.”

So I started logging my food. I ordered Leanness Lifestyle–the book. I saw results really quick thought, “This is wonderful.” This was at the end of 2004. Early in 2005 I got into the very first Lifestyle 180.

At my highest non-pregnant weight I was an obese 205. I’ve also been a borderline anorexic 105. When I first came to Leanness Lifestyle I was about 140 pounds. When I left Lifestyle 180 I was 118. Marilyn This was the first time in my adult life that I actually looked normal and felt really good.

I now live happily in the mid 120s. I’ll be the first to tell you I go up and down a bit but never like over the past 25 years when it used to be 30 or 40 pounds. Now it may vary five or so pounds but no more.

I need to tell you this one thing about Leanness Lifestyle – “It works. I was never an athlete. It worked through my knee surgeries. It worked through an impinged shoulder. It works with arthritis. It works with lots of stuff. Most people my age are suffering with diabetes or high blood pressure or lots of these other ills and I don’t have any of those.”

I look forward to working with you as one of David’s Graduate Assistants!

Angie List-Sheets B.ScE

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Angie was top student in her Lifestyle 180 course. A seasoned Lifestyler you won’t find a more compassionate Coach and communicator than Angie. Busy with a husband and two kids she continues to exemplify what living a Leanness Lifestyle means and I know you’re going to enjoy Angie’s reviews of your progress during your Lifestyle 180 journey.

I’m in my early 40s. I’ve been happily married to my sweetheart, Chad, since 1996. We have two beautiful children.  Before LL, I lived my life in my 20’s and 30’s like a lot of people do. I went to college, I got married, I worked like a dog. I did all these things I thought I should do. Before LL, I was convinced that you had three sized of clothes in your closet, that a Dr. Pepper and a brownie was acceptable for breakfast, and, especially after my first pregnancy, that this was the body that God gave me and that there really wasn’t a lot of leeway or control over it.

Coach Robin, who is a very dear friend of mine and neighbor, started in on me in 2004 to try out Leanness Lifestyle. In February of 2005, I did. I did Lifestyle 180 in 2005 and the next level course that same year. I was top student in my class, which I’m still very proud of even now. From the beginning of February ’05 to the end of May, I dropped about 40 pounds and really actually never imagined that I would do that.

In my WHY statement I remember specifically saying, “I’m losing weight, and I’m gaining confidence.” I lived in maintenance for about six months, and then I got pregnant with my LL baby, (as I like to refer to my second pregnancy!). After baby number two, I lost my weight again. I’ve lived with a reasonable weight ever since. It’s been nine years since I’ve started, and the confidence booster is really my big thing.

I’ve always been a people pleaser. I prided myself on taking care of everyone but me and realized actually that that pride was hurting me.  I wasn’t putting me into that equation.  Now I do. It’s a ripple effect. It’s affected my family, my children, my marriage, my friends.  I am currently training for my sixth half marathon, which I never, ever thought I would do in my 40s!

For me, LLU  is exciting! It’s something that works through thick and thin. It’s worked on the emotional side for me.  It helped me work through a couple of deaths and some major life changes that have happened in my life, and here I am. Proud to be still very much involved in coaching because I like to pay it forward. I get excited when I talk to Lifestylers about their transformation because I know how much it changed my life. That’s me.”

To say that this journey has been life changing is an understatement. Because of this journey I am able to live my life to its fullest and be the best wife and mother I can be. I have also made some of the best friends I could ever ask for!

I look forward to meeting new students at the start of each cohort.  They’ve invested their time and energy into LLU, and I’m anxious to make sure they get started on the right track.  I know it sounds corny, but it’s an honor and privilege to be on the sidelines helping, cheering, supporting students as they realize, work towards, and achieve the goals that are so important to them!

Wanda Cox M.S. (Certified Wellness Coach)

OLYMPUS DIGITAL CAMERA Wanda was first a runner up in her first course and was a Co-Grand Champion in the next evolution course she took here at LLU. In all Wanda has lost 120 pounds with LLU! And she is down a total of 170lbs from her all time highest weight. And then Wanda is a wonderful addition to our Coaching team. As one of your Coaches you’ll see she delivers a very special mix of intellectual and inspirational communication that is simply tops. Everyone loves Wanda and if you join Lifestyle 180 you will too.

Hi, I’m Wanda Cox, a single, 47 year old woman who lives in the Greater Boston area. I am a native of New Haven, CT. I was a chubby kid who morphed into a morbidly obese adult. At my highest, I weighed 360 lbs on a 5’10” frame. An avid baseball fan, I am on a quest to visit all 30 MLB fields. With 10 stadiums visited, I am happy to report that sitting in those stadium seats is much more comfortable after losing a significant amount of weight.

I have a long and varied weight loss history.

My most ‘successful’ loss prior to LLU was 120 lbs. I accomplished this in approximately 11 months on a medically supervised fast. I began the program weighing in at 360 lbs and dropped to 240 lbs. my diet consisted of meal replacement shakes, prepackaged meals, and bars. What was the result of this weight loss? I spent thousands on packaged foods, medical tests, and doctor’s visits. I subsequently regained 90 of the 120 lbs lost. The weight gain began shortly after I ended the fast and returned to normal eating. In addition, due to the nature of the rapid weight loss, I developed pancreatitis and gallstones and had to have my gall bladder removed.

I joined Leanness Lifestyle fully expecting it not to work. By the time I started my first Lifestyle 180 in February 2011, I was convinced that I was broken. I believed, as frequently reported in the media, that yo-yo dieting had permanently damaged my metabolism and that I was destined to be morbidly obese. I expected that this program would end as all the others had and prove the theory correct. It was my plan to finally accept the inevitable with the knowledge that I had tried everything I could.

It didn’t work out that way. I completed two Lifestyle 180s. I started at 305 lbs and to date have lost a total of 120 lbs. I am currently at my lowest adult weight.

A list of my weight loss attempts:

  • Weight Watchers. Joined and rejoined a number of times
  • Any number of magazine diets
  • “Body for Life”
  • “Fit or Fat”, Covert Bailey
  • Diets by Dr. Dean Ornish
  • A weight loss research study led by Yale University while in high school
  • “Stop the Insanity” by Susan Powter
  • Fitness equipment marketed by Tony Little
  • “Fats that Heal, Fats that Kill”, Udos Erasmus
  • Second and third attempts at HMR, following a less stringent program that allowed the addition of fruits and vegetables to my diet
  • Visits with nutritionists who all repeated the same message: follow the food pyramid, eat whatever I wanted in moderation; and, move a little more.

My weight loss journey has impacted my life in so many ways. It has ignited a passion in me to help others live the lean and healthy lifestyle that they desire. In fact, I am currently studying to become a certified Health and Wellness Coach.

I am looking forward to working with you as you begin your own journey. I can’t wait to witness your transformations!

Kristin Gadbois R.D.

head_shot Kristin is a Registered Dietitian and graduate of Lifestyle 180. As one of our newest Graduate Assistants you will find her to be very sharp, compassionate with each communication, expressing not only empathy for where you are in your journey but, because of her education, training and real-world experience, you will find her communication to be uniquely qualified to help you assess your nutrition and behavior pitfalls. Like every Coach we have she’s wonderful and we’re glad to have her on our team.

Hello Everyone! I am Kristin and live in NH with my wonderful husband, Alex, and our two just-as-wonderful children who are in elementary school. I am in my early 40’s and am native to Rochester (Rush), NY, where I went to RIT and became a Registered Dietitian. I worked as a clinical RD at Rochester General Hospital and provided nutritional counseling for an outpatient weight management program at the University of Rochester/ Strong Memorial Hospital. We have been in NH for 8 years, where I have stayed at home and my husband is a Hospitalist (Internal Medicine MD) at Concord Hospital. We enjoy mountain and road biking, skiing, XC skiing and just about anything outdoors!

I came to LLU about 6 years ago, and was in the process of getting back into shape after our daughter was born and had stalled out following “Body for Life”. I knew I needed to “dig deeper”, and Leanness Lifestyle was mentioned online. I was so, so impressed! Here was a sound, scientifically-backed lifestyle that I wholeheartedly agreed with! I went on to ultimately achieve a “try it on” weight of 111lbs. at 5’4”, and am happy in the 120’s.

I am so very happy to be a part of LLU. When David asked me if I would like to be an assistant coach, I was truly honored. As an RD, I can tell you that there is nothing else out there as comprehensive as LLU. This is not a static program filling a trendy niche; LLU evolves based upon scientific merit. Coach pours over research studies, journal articles and books to provide not only sound advice from a nutritional and exercise perspective, but in lifestyle as well. You have come to the right place, and it is a joy to meet so many amazing people and to see every success!

Walker Stradley

Walker0917 Walker Stradley is a true gentleman in every sense of the word. He’s also a male Grand Champion winner of the 2013 transformation challenge here at Leanness Lifestyle University! We are very pleased to welcome Walker as the newest addition to our Coaching staff. I know if you work closely with him you will enjoy learning and being encouraged by this true champion.

Hi, I’m Walker Stradley. I’m a manager of a small farm and ranch in southwest Texas. I’m 56 years old and my beautiful wife Connie and I have been together for 23 years.

I have been a student of Leanness Lifestyle University since 2002. I first started a lifestyle change at a weight of just under 240 lbs. Today I maintain my weight at 175 to 185 lbs. It has taken me many intensives and tune ups to get to the weight I am at today.

It is such an honor and privilege to participate in my journey of health and fitness as an Assistant Coach. All the people I have ever met through LLU are my heroes. They are people who set the bar in my opinion and if I can use my LLU experience, strength and hope to help them achieve their personal goals then I am blessed beyond measure!

Emotional thoughts can be full of deception,
Yet I will persist without exception!
At times I may fail at this worthy endeavor,
Still I move forward for success lasts forever!

How Do You Get Started?

Students can begin their weight-loss journey at LLU with Lifestyle101 – a FREE 5-day IntroTo Weight Loss. As a Lifestyle101 student you’re taught the fundamentals of quick, intelligent and sustained weight loss with video, printable resources and access to all online tools within the LLU campus for five days.

Twice a year LLU offers the most advanced weight-loss program available anywhere, online or in person, called Lifestyle180. Lifestyle180 is a 20-week, online, lifestyle-education course for permanent weight control. As an L180 student, whether beginner or advanced, you’re part of a small group of other motivated, like-minded people and you’re never alone. You receive instruction directly from David. You also receive accountability, motivation and support from experienced Assistant Coaches who have successfully lost weight using LLU and have graduated the course.

LLU accepts students from all over the world. Students of every walk of life, from over 30 different countries, have used the LLU tools and educational system to transform their bodies and their lives for the better.