Manhasset, New York
Customized Personal
Training Gym
Everyone's goals, medical history, lifestyle routine and movement anatomy are all very different, therefore we believe your fitness program should be as well.
Who We Are
Strength In Mobility is a customized personal training gym, designed for you to be the very best version of yourself!
Everyone’s goals, medical history, sports, lifestyle routine, injuries, strengths, weaknesses, movement anatomy are all completely different, therefore your fitness program should be!
We tailor each persons program specifically to them. We have created an encouraging, driven and successful environment to help you achieve your fitness goals.
Open Gym Membership
$85
Open Gym membership is offered to those who train at Strength In Mobility. Open Monday-Sunday from 5am-9pm.
Receive your own personal digital keypad code for easy access.
Train independently whenever it fits your schedule.
Continue building strength and mobility outside of coached sessions.
Available exclusively to current Strength In Mobility clients.
This open gym membership is offered to the individuals who are currently personal training with us here at Strength In Mobility.
We want to offer you all the support to help you achieve your fitness goals! By signing up for the monthly open gym membership, you will receive your own personal digital code to access the gym and train on your own.
1-On-1 Personal Training
Everyone is at different stages of life and has different goals. Therefore, we believe your training program should reflect that. We first sit with each individual for a fitness assessment. We go over your goals, medical history, current lifestyle routine, current exercise routine, discuss nutrition, take your VO2 max, put you through a movement screen, take your body fat percentage, skeletal mass index, and before photos. From all the information we gather, we then design a fitness program tailored specifically to that individual.
Discuss your goals, medical history, lifestyle, exercise routine, and nutrition.
Complete a fitness assessment with VO2 max testing and a movement screen.
Track body fat percentage, skeletal mass index, and before photos.
Receive a fitness program tailored to your individual needs and goals
Our Process
-
Initial Consultation
We start by sitting down with you one-on-one to get to know you beyond the gym. We'll go over your goals, medical history, and current lifestyle routine to make sure we have a full picture of where you are and where you want to be.
-
Nutrition Assessment
We take a closer look at your current eating habits and nutritional intake. Understanding how you fuel your body is a key part of building a program that truly works for you.
-
Movement Screen
We put you through a comprehensive movement screen to assess your mobility, strength, and movement patterns. This helps us identify any areas that need extra attention and ensures your program is safe and effective from day one.
-
Body Composition Analysis
We measure your body fat percentage and skeletal mass to establish a baseline. This gives us the data we need to track your progress accurately over time.
-
Before Photos
We take before photos as a visual starting point for your journey. These are kept private and serve as a powerful reminder of how far you've come.
-
Your Custom Program
With everything we've gathered, we design a program built specifically around you — your goals, your body, and your lifestyle. No generic plans, just a strategy made entirely for you.
Meet your Coach
Kim Hartfield
I grew up in Northern California with both parents and 6 siblings. I grew up very active, playing competitive soccer & basketball along with snowboarding, water skiing, running and riding ATV’s. I came to NY with just a suitcase to help with Superstorm Sandy for 3 weeks and I never went back home. I told my parents I'm staying in NY and I've been in NY ever since. I started Personal Training in 2014 and worked at Equinox for about 7 years and worked my way as a top Tier Personal Trainer. Once the Covid pandemic hit and all companies closed their doors, I opened my own and opened my 1st gym in Great Neck Long Island. After 2 years in Great Neck, I then relocated to Manhasset and have been here ever since.
I am certified: NCSF, CrossFit, Precision Nutrition, Pre & Post Natal, Titleist golf, Hyrox, Myofascial Release
Frequently Asked Questions
-
We offer a range of solutions designed to meet your needs—whether you're just getting started or scaling something bigger. Everything is tailored to help you move forward with clarity and confidence.
-
Getting started is simple. Reach out through our contact form or schedule a call—we’ll walk you through the next steps and answer any questions along the way.
-
We combine a thoughtful, human-centered approach with clear communication and reliable results. It’s not just what we do—it’s how we do it that sets us apart.
-
You can reach us anytime via our contact page or email. We aim to respond quickly—usually within one business day.
-
We offer flexible pricing based on project type and complexity. After an initial conversation, we’ll provide a transparent quote with no hidden costs.
-
Collaborative, honest, and straightforward. We're here to guide the process, bring ideas to the table, and keep things moving.
Get in Touch
Ready to start your Fitness journey?
Would you like more information about Strength In Mobility or would you like to start personal training with us? Kindly fill out your information below and the owner of Strength In Mobility will reach out to you within 24 hours.