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 is completely mobile and tablet friendly too!

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.

Mary Greenwalt R.N.

mary_2017 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 since 2007! 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 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.

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

LLU Headshot

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’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 LLU 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.

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.  LLU gave me the confidence to run, something I (again) never thought to be possible. I’ve finished 8 half marathons and countless other races.

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.

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!

Dr. Deborah Johnson M.D.

dr_deb_headshot Dr. Deb is a graduate of Lifestyle 180, Lifestyle 218 and Lifestyle 365. She has lost and kept off over 70 pounds for several years now. She has traveled the road before you. She has achieved lasting weight-management success. While we have always been attractive to intelligent, science-based individuals from every walk of life, we are so very fortunate to have not only Dr. Deb’s intelligence as a physician but also her wisdom and life experience.

My name is Deborah Johnson and I’m a still-practicing gynecologist. At the age of 65 I joined Lifestyle 180 and lost 62 pounds in one year!

Prior to LLU I had battled my weight since the age of 11. I remember being taken to my pediatrician and being put on a weight-loss medication. During those tender years I remember always being the last to take a lap around the track in school.

I played volleyball and basketball in high school and graduated weighing about 150 pounds. In college, however, I gained about twice the Freshman 15 and it only got worse when the incredible stresses of medical school presented.

I began my residency weighing 208 but gained and lost 30-50 pounds numerous times after that. Finally, after a stressful new-baby adoption and other life stressors I found myself at 307 pounds at the age of 50 in 1999. Too embarrassed to see my own physician I lost weight until I was back under 300. It was then I discovered I was hypertensive, pre-diabetic and asthmatic. In all, eventually, I was taking four blood pressure medications to maintain control of my hypertension.

Throughout the years I’ve tried the HCG diet, E-diets, Michael Thurman, Jillian Michaels and more. Finally, at the age of 65, after sitting on the Leanness Lifestyle University sidelines (a.k.a., I was on the mailing list but never signed up), I decided “I need to get this done.”

I joined Lifestyle 180 in February of 2013 weighing 218, on the lower end of my 30-pound range, and a frequent sticking point. 20 weeks later I was 178 pounds! 32 weeks later I weighed 156 pounds! It feels exhillarating and I’m excited to now be able to make my body do all sorts of things — even strength training which I’d never seriously tried before.

I look forward to continuing my journey and assisting new and returning students alike to achieve everything they were meant to be. I’m living proof that age is just a number and it’s never too late to get in great shape!

Sandy Dooley

sandy_small Great things come in small packages and Sandy absolutely exemplifies this in every way. Sandy is a graduate of Lifestyle 180, Lifestyle 218 and Lifestyle 365. She has lost and kept off over 120 pounds for years now. Her spirit is undeniable and infectious and she knows of what she speaks. She loves helping students learn the strategies and system she used as an LLU student so they can, like she has, achieve success beyond their wildest dreams.

I’m Sandy Dooley, a 61 year old Kindergarten Teacher from Atlanta Georgia. Always a chubby kid, I finally got a handle on my weight as a young adult until I didn’t have a handle on it at all. I tried EVERY “diet” and even invented some of my own. There was the One Thing a Day Diet, one thing a day and that was it, it could have been a hamburger or a bowl of popcorn, or a salad, in any case after I ate the one thing that was it.

You may be familiar with The Beverly Hills Diet, did it. The Cabbage Soup Diet, did it. Weight Watchers, yep, Mom put me on that one. Herbalife, lost 72 lbs. on that one. The Diet Police, a friend and I made this one up; we called each other when we were going to eat off plan. I lost weight on every one of them. Every diet was so successful that when I found Leanness Lifestyle I weighed 245 lbs. Oh, by the way, I am 4’ 11 ½” tall. Visualize a chunky Sponge Bob. 

I met a young couple who were involved in a Program called Leanness Lifestyle. The weight just seemed to melt off of them. Their results were so amazing that I had to give it a try. Lo and behold, I found the paradigm that works for me! 

I started with Leanness Lifestyle in 2012 weighing 245 lbs. I graduated Lifestyle 180 with a weight loss of 99 lbs. I started Lifestyle 218 weighing 146 lbs. and graduated with a weight loss of 34 lbs. I lost 133 lbs. in 15 months! 

Today at 122 lbs. I am strong, confident, and HAPPY. Through Leanness Lifestyle I have learned about Real Food, Exercise, and how to live as my Authentic Self. I apply the scientifically based answers to the hows and whys of weight loss. I am part of a community of supportive people who strive to be exceptional. I love Leanness Lifestyle and Coach David Greenwalt for changing my life! 

It is my goal to help others live lean and fit, to be better than they ever imagined, to have an amazing future. It is important to me to share the knowledge I have gained, the experiences I have had, and the joy that I have found by lovingly taking care of myself through Leanness Lifestyle.

Chris Avery

chris-avery-headshot Chris Avery is a Lifestyle 180, Lifestyle 218 and Lifestyle 365 graduate. He has lost and kept off over 90 pounds. Although Chris stuggled for many years to get and keep the weight off he’s never been one to give up. Chris is a classic case of someone willing to work incredibly hard and intensely but who, until he found LLU, had his ladder leaning against the wrong wall. Once he put in the effort and intensity with the right ladder leaning against the right wall he has climbed to new heights and our students are fortunate to have his passion working for them to do the same.

Hi, my name is Chris Avery and I am a 40-something salesman living in western Massachusetts with my beautiful wife Kim and two incredible daughters. I’ve got a great job, wonderful family and friends, and more blessings than I can count (especially after re-gaining my health thanks to LLU).

Prior to LLU I hit an all-time high weight of 280 pounds on my 5’10” frame. I was miserable. I had what I refer to as a case of the “f@#% its” where I just didn’t care about what I ate or drank and I lived a very sedentary lifestyle, spending my time either in the car, at a desk, or parked in front of the TV with pizza, beer, chips, you name it.

I had struggled with my weight for the last 20 plus years trying all sorts of “diets” and approaches. I did Atkins, South Beach, paleo, hypnosis, and other extreme diets and workouts to lose weight, all of which would work short term, but I would always gain it back and then some. I participated in weight loss competitions with guys from work, losing 60 lbs in 8 weeks through some pretty extreme methods. Sure, I lost the weight then but ended up putting in all back on and more. It was like a roller coaster but not the fun kind; this was downright depressing.

I found LLU because a friend of mine “liked” the page on Facebook. That was in December of 2015. I checked it out and thought the program looked like a good fit for me. To be honest, I was hesitant at first because I felt “I’ve tried everything and nothing REALLY works; why should this be any different?”

What stood out to me about LLU was Coach David’s evidence based approach and how he said “one more time for the last time” 

I joined L180 in January of 2016 weighing in at 268 lbs, a 44 inch waist, high blood pressure, and very out of shape. I couldn’t climb the stairs to say goodnight to my girls without getting winded. Well, I followed the program and the coaches’ advice and I can say that it not only worked, but it has changed (and probably saved) my life! I’m now at my lifetime goal weight of just under 180 lbs and in better shape than I’ve been in years. My tight 44” waist pants have been replaced with 32s (which I haven’t been since high school) , I’ve lost 92 lbs, 2.5” from my neck, 8.5” from my chest, and 13” from my waist.

I have truly made a lifestyle change and it is thanks to the LLU program and the fantastic people associated. I am honored to become part of such a fantastic program and I look forward to continuing my journey while helping others reach their goals as well! 

How Do You Get Started?

Students can begin their weight-loss journey at LLU with Lifestyle 101 – an Intro To Weight Loss. As a Lifestyle 101 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.

LLU offers the most advanced weight-loss program available anywhere, online or in person, called Lifestyle 180. Lifestyle 180 is an 18-week, online, lifestyle-education course for permanent weight control. As a 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.