Join Keri's online coaching group, The LEAN Life

A Lifestyle of Efficient excercise and Automated Nutrition (L.E.A.N.)


I asked current members of the group what they get out of it. Here are a few of their responses:

What is the LEAN Life Coaching Program?

The LEAN Life Coaching program is a membership for busy women who want to get strong and fit without restriction and deprivation. Whether you want to lose fat, build muscle, learn how to balance your hormones or better your mindset with food - this coaching program has got you covered! 

WHY the LEAN Life Coaching Program? 

Most people are very good at procrastinating when it comes to diet and exercise…you know, feeling like the conditions have to be perfect in order to get started? Or that they have to remain perfect to continue? They start a new diet and exercise program on a Monday because it feels like a clean slate. An ideal start to a “perfect” week. Usually by Friday though, the thrill has worn off and they’ve fallen off the ‘eat healthy and exercise’ wagon. They stay in that cycle for far too long, letting days, weeks, even months pass by with little to no progress. Let me tell you, I’ve struggled with this as well. It’s so common, and feels so hard to reverse too, doesn’t it? It’s the worst.  

That’s why I created the LEAN Life Group Coaching Program. The purpose of the LEAN Life Coaching Program is to inspire, encourage, and guide busy women, just like you, to #justSTART.

You can be consistent. You can see great results. You can find balance and motivation. And I want to help you do it!

No more waiting for the perfect time. The LEAN Life group coaching program helps you take confusion and procrastination out of the equation with proven systems that work! 

Inside the LEAN Life Group Coaching Program you will receive:

  • 3 efficient and effective total body workouts every month designed to build strength and lean muscle to get better results in less time. Including live sessions (Tu/Th 6:20am EST and S 9am EST)
  • Modifications to meet all fitness levels
  • Video demonstrations and coaching throughout the entire workout.
  • Flexible monthly schedule that you can adjust to meet you where you're at
  • An exclusive (optional) Facebook community full of like-minded women who provide support and accountability
  • Facebook posts from me to keep you engaged and motivated
  • Monthly Q+As discussing mindset, and FAQ's, plus exciting challenges to facilitate goal implementation
  • A private portal with videos on hormones, nutrition, training and more! 
  • Over 100 LEAN Life approved, easy to follow recipes 
  • Dozens of fully recorded workouts for those who enjoy adding more variety to their routine

Who is the LEAN Life Group Coaching Program for? 

  • Women who want to learn more about how hormones affect their body and as a result, have more energy, feel lighter, tighter, and less bloated.
  • Women looking to get leaner, stronger or just feel better in their clothes.
  • Women who want to repair their relationship with food and have FUN with their exercise routine.
  • Women who are sick and tired of “starting on Monday” and want to get rid of the “all or nothing, more is better” mentality.
  • Women who want to work with an expert to program their workouts without spending a fortune, and get feedback and advice based on their individual needs and goals on a daily basis.
  • Women who are looking to develop more consistency, sustained motivation and accountability in their health.

  • Women who feel "stuck" with their fitness and fat loss goals and want to learn the most effective and efficient ways to exercise to optimize fat burning.
  • Women who are ready to stop dieting and start living a lifestyle that will not only get you great results, but also be something that they can sustain.
  • Women who are ready to focus on the PROCESS of getting stronger, both physically and mentally.

My name is Keri Mantie and I help women develop a healthy relationship with food, exercise efficiently, and create real-life solutions to feeling their best, both inside and out so that they can stop the “all or nothing” dieting mindset, reach their goals and maintain those results in a healthy and balanced way.

I'm a mom to 3 boys, CJ who is five, and 12 year old twins, Michael and Drew. And just like the hundreds of clients I work with, it is my mission to balance family, fitness, nutrition, and FUN! This is why I created the LEAN Life Group Coaching Program – to combine family, fitness, nutrition, and fun, in that order!

I have a Masters Degree in Applied exercise science, and a bachelors degree in exercise physiology. I hold my level 1 kettlebell and bodyweight certifications through StrongFirst, am a Certified Strength and Conditioning Specialist (CSCS) a Metabolic Effect Nutrition Consultant, specializing in hormonal fat loss for women and a newly certified Health Mindset Coach.

I've been in the fitness industry since 1997 and have worked with thousands of clients, both in-person and online, helping them to achieve their health and fitness goals.

Build REAL Life strategies and solutions to feeling your best, both inside and out. 

If you're anything like me, you're busy! You have a career, a family and you want simple solutions, sustainable results, and reliable support to help you get to your goals. You are ready to look and feel your best. You’re ready for something you can stick to for the long-haul. You NEED A PLAN!

Inside the LEAN Life Coaching Group, I’m all about simplifying the process by helping you create REAL LIFE strategies and solutions that you can implement immediately to create long-lasting results.  

"Since becoming a member of Keri's private coaching group I have found myself in various fitness stages such as prepping for a wedding, my first pregnancy and now a busy mom. While my goals of each stage were very different the coaching allowed me to stay consistent, receive support and motivation when it may have otherwise been lacking, and most importantly guidance from a highly qualified coach who I can trust to give me up to date, valid information. Keri makes balancing a L.E.A.N lifestyle achievable without making you lose your mind. I know this group will continue to help me in all of life's stages." 

- Alicia

"Where do I start? Keri, you have completely changed the way I think. From the food I put in my body, to the way I exericise and most importantly, how I think. You have given me the tools to be a healthier ME! 

- Patty

"I literally have not worked out LESS in my entire life and gotten better results. I look and feel better than I ever have. After having my second baby I lost some weight and then was just stuck and now I've lost that much more weight just by making small changes. I TRY to get workouts in when I can and with my busy schedule sometimes I don't or I do a 10 minute video. I don't feel guilty about it either because I'm making better food choices! I used to do endless hours of cardio & eat foods that were doing nothing to fuel fat loss. I was stuck at a weight for the longest time. Keri's group has been eye opening for me & has really made me appreciate my body! I don't go by what the scale says anymore and I rely on how I feel and how my clothes fit. Thank you so much for all of the advice and support!!" 

-Christina M.

Keri's coaching philosophy has made me realize that life isn't always perfect and life sometimes gets in the way. Things don't always go the way we plan but that's okay. Through this group I have learned not only how to live a healthy lifestyle but also how to balance working out, staying fit and eating healthy all while still living normal life. The major thing the group has taught me is that diets don't work but lifestyle and habit changes do!" 


"I really can't say enough about what I have learned and gained from this group. I am stronger than I have ever been and I don't go to the gym for hours or feel guilty for eating brownies....I don't even belong to a gym! My workouts happen at home during nap time or with the kids right there with me, so they need to be quick and effective.  

When I started, I just wanted to feel a bit more comfortable in a bathing suit after I had my second child....I honestly didn't expect the results I got, especially because I don't feel deprived AT ALL. I can still have wine, dessert and even bread...just not all at once and all the time like I used to.  

Little changes like replacing my bowl (or okay maybe 2 bowls) of cereal every morning with a protein shake or eggs, lifting heavier weight and really just thinking about what I was eating and planning for splurges went a long way in terms of how I look and more importantly how I feel. I feel amazing, no more back/neck pain from carrying/lifting kids all day and lots more energy.

-Kim S.

"I joined Keri's coaching group in May. Since that time, I have completely redefined the way that I look at food and exercise. I always knew what I "should" be eating. I've done other plans before that were food plans, and what they told me was obvious: cut out fat, cut down on bread, limit alcohol and work out every day. I would be told what to have for breakfast, lunch, and dinner and two snacks. I would lose some weight, but would inevitably go back to my "regular" eating when the program ended. With Keri, she explains WHY certain foods are better than others and what effect hormones have on fat loss. This is especially important to me as I enter menopause. Her approach just makes sense for the long-term. It's not even a "program" for me; it's a lifestyle. How many pounds have I lost? I don't know, because I don't weigh myself anymore. But I do know that I'm down a full size in all of my clothing and I feel better physically than ever before. I'm so happy that Keri advised me to take my measurements and pictures along the way. The scale doesn't tell the story but pictures certainly do! The added bonus to all of this: the group support from the closed Facebook page. Those ladies are inspirational and funny and real. Can't say enough about it!" 

-Donna M.


What equipment will I need for the workouts?

You can complete all workouts with just a set of dumbbells, but I recommend having a heavier (for you) set and a lighter set. For example, a set of 15lbs. and a set of 25lbs.

How long are the workouts?

All workouts are between 30-40 minutes (including warmup). There are also shorter ones on the portal if you need something under 20 minutes!

Can you provide me with a sample workout?

Sure thing! This is an example of an AMRAP. Copy and paste this link to your browser:

Do I have to follow the programming as it's laid out?

Not at all! I want this to fit YOUR lifestyle. Some months you may only be able to get in one workout a week, others you may be able to get all 3! This program is *very* flexible, not rigid. I completely understand that life happens!

Do I have to pay extra for the LIVE classes?

NO! The live classes are JUST as much for ME as they are for YOU! I follow the programming, too! These are the workouts I do week in and week out. I love being able to workout "with" you! So, no, I don't charge extra for them. And if you can't make them "live", you can follow the recording or print out the PDF.

How would you describe the workouts?

Because the majority of my clients are working out at home with minimal equipment, we tend to do more metabolic conditioning type workouts. They are all total body with a goal to get you out of your comfort zone in a safe way. All workouts can be modified to fit your needs.

How does the nutrition aspect of the program work?

There are numerous videos housed on the portal discussing how to create your own fat loss lifestyle. I also do weekly Q+As and you can always ask any nutrition related questions on the FB page.

Immediately after payment you will be re-routed to a registration page where you will choose a username and password for direct access to the LEAN Life private portal. Email if you experience technical difficulties logging in.  

Disclaimer: The information presented herein is in no way intended as medical advice or to serve as a substitute for medical counseling. The information should be used in conjunction with the guidance and care of your physician. Consult your physician before beginning this program as you would with any exercise and nutrition program. If you choose not to obtain the consent of your physician and/or work with your physician throughout the duration of your time consulting with Keri Mantie you are agreeing to accept full responsibility for your actions.