Welcome to JNPT

Overcome more than just the weights in the gym.

At JNPT, my goal is to help you get stronger, stay consistent, and commit to better long-term health.

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About JNPT

Hi, my name is Jack Nesbitt. I’m the owner & founder of JNPT.

I started as a PT in 2017, working in a large commercial gym. While I wanted to help as many people as possible, I found the environment was holding me back. I wanted a place where I could take my clients on a journey in a safe and supportive space where they could really thrive.

In 2018, I opened JNPT Studio here in Mount Barker and we haven’t looked back since. Over time, things have evolved from outdoor group classes to nutritional coaching and more, but at the centre of it all has always been my passion for strength training.

What We Do

The fitness industry is full of misinformation, especially when it comes to lifting correctly.

My goal is to not only teach you how to lift safely and effectively but also help you understand your body and how to get it working at its best.

As we get older it becomes harder to build and maintain muscle. When we lose muscle, we lose strength, balance, and function, which can lead to chronic issues and injuries. Strength training builds muscle, strengthens bones, supports mental wellbeing, improves balance, and helps you stay active for life.

I also believe getting stronger builds confidence well beyond the gym. Pushing past what you thought your body could do helps you handle challenges outside of training too.

At JNPT, I work with people who have never picked up a dumbbell as well as those who have been training for years but have not seen the results they want. What everyone has in common now is a drive to get stronger, stay consistent, and commit to better long-term health.

Hear From Our Members

Why JNPT?

Why choose JNPT?

If you’re wondering why you should choose JNPT over other group fitness options, here’s why our members choose us:

Increase in Strength
Improved Flexibility
Completely customised programs made for you only
Build Muscle for longevity and wellbeing
Lift correctly and effectively
Recover from niggles and old injuries
Relaxed and Non-judgmental environment
Community orientated gym space
Guaranteed stronger in just 4 weeks

What We Do

What We Do

Group Strength Training

Group Strength is what JNPT is all about. It’s about building a strong, capable, healthy body for long-term health, no matter your current fitness level.

Sessions are intimate, with a maximum of 6 people in the gym and are focused on you as the individual, unlike typical large group fitness classes. You receive a fully custom program each block based on your goals, fitness level, and any limitations you may have.

Your coach works very closely with you to achieve the best results week in and week out. At JNPT, everyone is coached on an individual level, and ongoing adjustments are made to your program to meet your specific needs, just like in a 1:1 personal training format.

Group Strength is perfect for anyone who wants to learn how to lift weights safely and correctly, build a strong healthy body, and train in a safe, friendly, and community-orientated environment.

Most people start Group Strength to develop great training habits and often stay to become long-term members and an active part of the community. While we are serious about teaching people how to lift at a high level, we are just as serious about having fun with it.

If you want high-quality coaching in a fun, relaxed environment, this is for you.

Membership Options & Pricing

Group Strength Training

Membership Options

Our Group Strength memberships are simple and flexible, with options to train one, two, or three days a week so you can choose what works best for you.

1 Day Per Week

$45 per week

1 x Group Strength session per week for a 12-week block*

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2 Days Per Week

$85 per week

2 x Group Strength sessions per week for a 12-week block*

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3 Days Per Week

$105 per week

3 x Group Strength sessions per week for a 12-week block*

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"Joining JNPT and working with Jack has actually changed my life....literally! Jack is incredibly knowledgeable when it comes to lifting weights for strength but he also has a wealth of knowledge surrounding nutrition and weight loss. Over the last 10 months working with Jack I have lost 8kgs, hit all new PB's and learned so much about nutrition and how to properly fuel my body. My mental health has improved incredibly and I'm the strongest l ever felt to be honest. JNPT is very much like a family we all look out for one another and encourage each other to be the best versions of ourselves!"

— Verified Client
"I've been a member of JNPT gym for six months now, and the improvements I've seen are incredible. I've never been able to commit to a gym or workout lifestyle before, but thanks to Jack and the amazing atmosphere at JNPT, I'm now stronger and fitter than ever. The sense of community here is like a family, and it's incredibly empowering to finally be able to lift heavy weights and feel strong as a woman in the gym. Jack is an exceptional PT and coach who writes fun and challenging fitness plans that keep me motivated and excited to work out. I now go to the gym three times a week, and I can't get enough of it! Plus, if you love Taylor Swift like I do, you'll enjoy hearing a lot of her music while training. Highly recommend JNPT and Jack for anyone looking to transform their fitness journey"

— Verified Client
"A friendly and inclusive gym with small group sessions and individually tailored programs... a great cost effective option to 1-on-1 personal training!"

— Verified Client
"Exercising with chronic pain from past injuries can be extremely difficult, but Jack's expertise and knowledge, combined with small class groups and a personalised program based around your needs, means that I have been able to work on getting stronger without triggering issues. He was recommended by a friend who worked out with Jack for years and glad I also started!"

— Verified Client
"I would never just join a gym, firstly because i wouldn't even know what to do or where to start. At JNPT you have the equipment you need, and the continual support of jack in EVERY session. Showing you on each rep how you can improve, keeping you on track to progressively get stronger, in body and mind. Small group session with wonderful people to keep you committed as well. You will not be disappointed or feel let down or ever question, should i hit the gym today. You know you are getting stronger, fitter and healthier. A total wellbeing gym"

— Verified Client
"Jack is a great trainer who always knows how to tweak technique so you're doing movements properly. The environment is always very encouraging and everyone is so welcoming. Would definitely recommend!"

— Verified Client
"I've tried gyms in the past and it's never stuck beyond a month or two. JNPT is a game changer and Jack is absolutely brilliant - very knowledgeable, experienced, enthusiastic and genuinely caring. He also brings warmth and humour to create a fun, supportive community which makes it a place you look forward to going, even at 6 am! | highly recommend JNPT - it's honestly one of the best things I've ever done for my physical, mental and emotional health. It's great to have your own personal program but do it within a small group setting. I love feeling my body getting stronger every week. Thanks Jack!"

— Verified Client
"Jack is an awesome trainer. He pushes me to my limits, listens to me whine the entire session, and always has ways to navigate my training around my neck issues. He has created a safe space, and is always looking at ways to help his clients and improve his service. Highly recommend JNPT, I also love the small groups, I will cancel a class elsewhere if there are more than 3 other people training, and i know I don't have to worry about that when training with Jack."

— Verified Client
"BEST PT in Mount Barker. Jack is a thorough, caring and very well educated coach who truly cares about each and individual client. I am a 22 year old and have loved working with him for years. The atmosphere and family he has created in his gym is amazing. Definitely recommend Jack and JNPT as a gym to go to"

— Verified Client