Strong, confident & mobile at every stage of life.
About your trainer
Petrina Oakley
I’m Petrina (or Trainer Trine), the face behind OAK.fit in Highfields, Queensland.
I have one simple mission: to help people feel stronger, move better, and build confidence at any age or stage of life.
With over 30 years participating in the fitness industry, I decided to turn my passion into something that I could share with others in Jan 2023.
My key focus is on functional fitness, long-term health and creating a welcoming, supportive space where you can genuinely feel that “Yes, I CAN do this!” energy. Surrounded by like-minded people, we enjoy a positive, social environment while working towards individual health goals.
You’ll also find me at parkrun every Saturday morning — my favourite way to kick off the weekend (with a well-earned coffee afterwards).
Petrina's Qualifications
I love learning and continuing to grow, and my qualifications reflect that.
• Certificate III & IV in Fitness
• Accredited Personal Trainer
• Accredited Mat & Reformer Pilates Instructor
• Accredited CIRCL Mobility Instructor
• Accredited Boxing Instructor
• Accredited Member of AusActive
• Training in Level 1 Female Fitness
• Resistance Bands
• Training in Lower & Upper Body Injury Management
• Functional Fitness Training
• First Aid & CPR Certified
My clients
I love to work with a wide range of clients — men and women of all ages particularly focusing on those in midlife to senior years — including those managing injuries, starting or returning to exercise, wanting to achieve a fitness goal for employment or event, or simply wanting to improve their strength, fitness, mobility, and overall wellbeing.
Ladies if you are menopausal or post then you are one of my special clients that I love to help through this challenging time in your life.
Services
Personal Training Session 1:1 or Small Group
OAK.fit personal training sessions are personalised one-on-one, partner, or small group workouts with Petrina, designed to help you move better, feel stronger, and enjoy your training experience.
Sessions are typically 45 minutes, however longer or shorter durations can be arranged if required.
Training is held:
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Outdoors at a local park in Highfields, or
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In your own home, if you would prefer to utilise your own equipment.
Every session is carefully designed around your individual goals, while taking into account any injuries, medical considerations, or movement limitations. Programs are structured to challenge you appropriately, build confidence, and most importantly — make exercise something you genuinely enjoy.
Whether you are just starting out, returning after a break, or looking to take your fitness to the next level, OAK.fit provides supportive, personalised guidance every step of the way.
Group Classes
OAK.fit group classes are proudly offered in conjunction with Toowoomba Regional Council - The Change Project initiative.
For just $5 per session, these fun and supportive classes deliver full-body workouts designed to improve:
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Strength
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Cardiovascular fitness
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Mobility
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Overall confidence in movement
Sessions are suitable for a variety of fitness levels, with options provided so everyone can work at their own pace while still feeling appropriately challenged.
These classes are a fantastic way to move your body, connect with the community, and build healthy habits — all in an encouraging and welcoming environment.
Transformation Tuesday – 6:00pm
Duration: 45 minutes
A full-body workout designed to boost both cardio fitness and strength. Suitable for all ages and fitness levels, this session brings energy, variety, and motivation to your week.
No two weeks are the same. Workouts may include:
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Bodyweight-only sessions
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Equipment-based training
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Circuits
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HIIT-style sessions
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Bootcamp-style workouts
On the last Tuesday of each month, we mix things up with a fun and empowering Box Fit session.
Mat Pilates – Wed & Thurs 9:00am
Duration: 45 minutes
A low-impact class that builds core and whole-body strength while improving posture and balance through controlled, mindful movements.
Mat Pilates focuses on technique, stability and alignment, helping you move better and feel stronger in everyday life.
CIRCL Mobility – Tues 7:00pm & Thurs 10:00am
Duration: 30 minutes
CIRCL Mobility blends flexibility, breathwork, and mobility to support recovery and improve movement quality.
Benefits you may experience include:
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Reduced tension and stiffness
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Improved range of motion
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Better muscle activation and circulation
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Enhanced balance
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Faster recovery after workouts
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Stress relief through movement
I'm excited to have you join us in class! You'll be directed to my Zumba Instructor Profile, where you can easily book any Oak.fit classes. Please note that payment (cash) is due when you attend the class, as no online payment is accepted. Don't forget to use the class code "fit" to finalize your booking. Looking forward to seeing you there!
Personalised Home or Gym Programs
Do you enjoy working out on your own but aren’t sure what to do?
I can create a personalised training program tailored specifically to you — aligned with your goals, fitness level, available equipment, and any injuries or limitations.
Your program will provide clear structure, progression, and guidance so you can train confidently and effectively on your own schedule, while still knowing you’re following a plan designed just for you.
Whether your focus is strength, weight loss, mobility, general fitness, overall health, or meeting specific employment fitness requirements, your program will support you every step of the way.
Train independently — with confidence and direction.
Revive & Thrive 6 Week Program
So what is Revive & Thrive?
A 6-week small group program for women who want to feel stronger, fitter and more energised — without pressure, judgement or feeling like you have to “keep up”.
Strength + cardio sessions (options for all fitness levels)
Pilates, mobility & core work
Supportive, welcoming community
Designed for real women, real bodies, real life
Perfect if you’re restarting, returning or wanting more structure & accountability
This isn’t a bootcamp.
It’s about moving better, feeling stronger and prioritising YOU.
Contact
Get in Touch
Have a question? Reach out to OAK.fit today!
