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4.0 Fitness

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Goals
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About
I am located in Southfield, MI. WHAT WE DO: With over 15 years of experience, I provide safe and effective personal training and nutrition planning in a comfortable, encouraging atmosphere. Instead of simply telling you what to do, I show you what your body is capable of. I use a multifaceted approach to exercise, implementing free weights, body weight, TRX, kickboxing, circuit training, cardiovascular exercise, and more. I am able to compensate for any limitations you may have, ensuring the best results possible and a great workout every session. I am equipped to guide you through a complete body transformation; be it weight loss, gaining lean mass, sports conditioning, pre or post-op exercise, improved balance and flexibility, pre/post natal, nutrition planning, or as a reliant motivator to hold you accountable! WHAT SETS US APART: I was a Medical Assistant prior to becoming a trainer which has enhanced my abilities. I know the human body extremely well and am always eager to educate clients on what they are doing and why. I am also a certified stretch practitioner! "Thumbtack Best of" recipient two years in a row. Current Thumbtack Top Pro
Overview

Hired 40 times

Background checked

1 employee

16 years in business

Business hours

SunClosedMon8:00 am - 6:00 pm

Payment methods

This pro accepts payments via Check, Credit card, Venmo, and Zelle.

Social media

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Top Pro status

Top Pros are among the highest-rated, most popular professionals on Thumbtack.

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2022

Services offered
Work location

My customers travel to me

Projects and media
Projects and media
Reviews

Customers rated this pro highly for professionalism, work quality, and responsiveness.

Excellent 4.9

27 reviews

5

96%

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Read reviews that mention:


pro avatar
Linnysha D.

Jan 5, 2026

Hired on Thumbtack

Shannon is absolutely awesome!! She taught me a lot of new workouts that I can do at the gym and at home with (and without) the equipment I already have so it’s been pretty cool having that versatility with the same impact no matter the location. She’s so nice, always flexible, and pushed me further than I thought I could go and I’m so proud of myself and I’m so thankful to her for her patience with me the whole way through. Her stretching techniques also left me feeling so much better after every single session so I highly recommend her to be a helper on your fitness journey too!!!
4.0 Fitness's reply
Linnysha, you’re an absolute doll. It’s so much fun working with you! Your determination is admirable. You have made such great progress and I’m so proud of you. I know you’ll continue to do great things on your fitness journey!
Personal Training
pro avatar
Rich M.

Nov 18, 2025

Hired on Thumbtack

The space is not very friendly. It is located in a cabinet making facility. We had to move boards to access the suite the first time. No signage. There are showers but I do not believe they are cleaned frequently. There was a dirty towel in the shower for all 3 sessions. Mostly, Flexibility regarding cancellation policy is too rigid. 4.0 Fitness requires you pre-pay for the entire month and if you miss a class, NO REFUND. The policy is not designed to sustain a long-term engagement. Buyer beware; I ended up pre-paying for almost 2 months because we started mid-month. 3 Sessions ended up costing me $675.00. NO REFUNDS. I cancelled because I was uncomfortable after the conversation. Most expensive personal trainer ever.
4.0 Fitness's reply
This is surprising and unnecessary. I don’t appreciate you marring my perfect 5-star rating for more than 15 years straight. I have been told many times how welcoming and cozy my space is. The shower and towels are cleaned frequently. The one left in the shower room was for wiping up the wet floor after showers. But it also gets washed. As far as your refund, you signed a contract that explicitly states I do not issue refunds unless you are injured or ill. I asked you to read it carefully. No, simply deciding to not continue does not warrant a refund. And I am not expensive. Personal training is a luxury and the price is reflected. I have a degree is health science and exercise physiology, almost 16 years experience, and 3 certifications. My price is based on that. If you can’t afford it, then hire a less qualified trainer. Also, as we discussed, I have a 24-hour cancellation policy in place like any other business. I have to abide by that as best as I can to run my business most efficiently. This is my livelihood. You should respect my time. AND, you forgot what time we were meeting for a session then wanted to reschedule when I was 10 minutes away. I graciously rescheduled you to the next day and you canceled that session outside of 24-hours! All of which I didn’t charge you for! So to say I don’t have flexibility in my policy is baffling. Good luck to you.
Personal Training
pro avatar
Tara S.

May 23, 2022

Hired on Thumbtack

Shannon is a top notch trainer. She’s constantly challenging me, her knowledgeable of the muscles and the way she knows form when lifting weights is really helping my strength. I would hire her again in a heartbeat!
4.0 Fitness's reply
Thank you, Tara! You were already strong, and your dedication to training has only made you stronger! I really appreciate that in my clients.
Personal Training
pro avatar
Paul F.

Apr 11, 2022

Shannon is absolutely amazing. She is so encouraging and positive and helps you no matter what your level of exercise is. This is the only trainer I trust intrinsically to better my health and well-being. Thank you for all you do!
4.0 Fitness's reply
Paul, this means the world to me. It's reviews like this that make my job so fulfilling. So proud of you!
pro avatar
Denise C.

Jul 20, 2021

Hired on Thumbtack

Just started - but already motivated by her Energy & Encouragement !! Excited to continue towards a healthier lifestyle !!! Thank you
Personal Training
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Shannon Guarnaccia

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