LEAN Life Group Coaching

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The LEAN Life Coaching club is a monthly membership program 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 relationship with food – this coaching program has got you covered. 

I know you’re busy. I know you have a career and a family and that life is too short to be stressing out over how many calories you’re taking in, or having to weigh and measure every morsel of food that crosses your lips.I know you’re probably overwhelmed, frustrated and possibly confused as to how to eat for your goals, or how much and what types of exercise is best. 

I specialize in simplifying the process and helping you to create REAL LIFE strategies and solutions that you can implement immediately to create lasting results. 


[text_block style=”style_1.png” align=”left” font_size=”20″]My name is Keri Mantie and I help women create a healthy relationship with food, exercise efficiently and come up with real life strategies and 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 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) as well as a Metabolic Effect Nutrition Consultant, specializing in hormonal fat loss for women. I’ve been in the fitness industry since 1997 and have worked with thousands of clients, both in person, as well as online, helping them to achieve their health and fitness goals.

I’m a mom to 3 boys, CJ (born May 2017), and 8 year old twins, Michael and Drew. And much like the hundreds of clients I work with, I am doing my best at trying to balance family, fitness, nutrition and FUN![/text_block]

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Check Out What People Are Saying about the
LEAN Life Coaching Group


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“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


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Christina M.

christina1 christina2“I’m so happy I took pictures because it really shows that hard work pays off!! I literally have not worked out LESS in my entire life and gotten better results. Starting weight in July was 154.. Weight today (January 9th).. 143. 11 lbs total! 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!!”[/text_block]

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Heather S.

“I want to share with you before and after pics from two months ago when I started your program. I was hesitant to take these pictures because honestly I wasn’t expecting to see much change. I’ve worked out LESS, but by focusing on your strength workouts and not doing as much group fitness at the gym, I’m really starting to see some changes! The adjustments I have made already have given me more energy. I use to feel like I needed a nap midday and that’s no longer the case! Thanks for all the sound advice. I love learning from you and the girls in this group. It’s been such a positive support system!”


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“LEAN Life has made me realize that life isn’t always perfect and life sometimes gets in the way and 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 changes do!” –[/text_block]

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Kim S.

kim-300x300“I really can’t say enough about what I have learned and gained from Lean in ’14.  I weigh less and 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.”


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Emily T.

“I just wanted to thank you for this program. It was EXACTLY what I needed. I was spending about two hours in the gym every night after work. I thought if I just walked instead of running I was giving up and my workout was a waste even when I lifted afterwards. For the amount of effort I was putting into it, I wasn’t seeing the results I wanted. My mom, ever so honest, even told me that she felt bad I worked out so much and couldn’t really tell. I knew a large part of it was my diet, but until working with you, I never realized how much of an effect what I was eating was having on me. I notice a significant change in my body, and I haven’t really lost much weight on the scale (maybe 2-3 pounds) but I feel so much better. I rarely, if ever, wore shorts, always felt like my legs were too big for my petite frame and I’ve worn them this summer and felt comfortable in them! Your honesty, the honesty of the women in the group and all of the support have been great! It’s nice that the group is so real and that people are honest about their struggles. Everyone builds each other up instead of putting you down or making you feel guilty. Thank you so much, Keri![/text_block]

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Kristin M.

“Yesterday I took a Zumba class and was told by a few people that I looked good! (I just saw them a few weeks ago). I’ve literally only lost maybe 2 more pounds but my clothes fit better and I feel stronger and other people are starting to notice! Someone actually said “wow! how much weight have you lost?!”[/text_block]

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Donna M.

dianapicstitch“I joined Keri’s Lean In 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!”[/text_block]

Try us for 2 weeks for $1. If it’s not a good fit, just cancel before the trial ends. Membership is $34.97 per month and you cancel anytime!

Or sign up for the year, save $100 and get a free 1:1 Nutrition Audit with me ($250 value).

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 keri.mantie@gmail.com if you experience technical difficulties logging in.


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.


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