Perth CBD, WA · 2.7 km from North PerthPersonal trainer5(159)
- Senior Fitness
- Midlife Adult Fitness
- Athletic Performance
- Free consultation
- Private studio
- Gym based
- Online coaching
- BSc Physiotherapy (2000)
View more about Extension Fitness
- About
Extension Fitness specialises in intelligent, sustainable training for midlife & older adults and distance runners. Head Coach Tim Karajas combines physiotherapy expertise with personal training to deliver programs that build strength without excessive soreness or injury.
- Qualifications
- BSc Physiotherapy (2000)
- Personal Trainer
- Experience
24+ years. Tim Karajas studied Physiotherapy (1997-2000) and worked in that field (2001-2005) before becoming a Personal Trainer (2020-present). Brings unique physiotherapy background to personal training. Semi-serious recreational runner with expertise in training without injury. Manages anxiety disorder and Tourette's Syndrome through running.
- Specialisations
Senior Fitness, Midlife Adult Fitness, Athletic Performance, Running Coaching, Strength & Conditioning, Injury Recovery / Rehab, Chronic Condition Management
- Training methods
Strength Training, Functional Training, Running Technique Analysis, Running Coaching
- Where they train
Private Studio, Gym-based, Online
- Ideal for
Midlife adults (40s-60s), Older adults (65+), Distance runners (1500m to ultramarathon), Recreational athletes, Busy professionals, Parents with limited time, People with chronic conditions, Post-injury/recovery clients
- Pricing
Personal training: Contact for rates; Online running coaching standard: Amount: $40/week; Currency: AUD; Setup fee: $50 (one-off); Current as of: 26 January 2026; Online running coaching intensive: Amount: $65/week; Currency: AUD; Setup fee: $50 (one-off); Current as of: 26 January 2026
- Free offers and trials
Complimentary initial consultation/session; Free initial phone consult with online coaching
- Online coaching
Methods: Final Surge platform integration with GPS running watch; Video consultations; Email/SMS check-ins; Unlimited video form checks (intensive plan only); Options: Cost: $40/week plus $50 setup fee; Name: Standard Online Coaching; Includes: Customised running program in 4-weekly blocks; Strength training using available home equipment; Free initial phone consult; Monthly progress check-ins via email or SMS; Exercise demonstration videos; Access to ad hoc PT sessions in off-peak times; Cost: $65/week plus $50 setup fee; Name: Intensive Online Coaching; Includes: Customised running program...
- Facilities
Raw Fit Co Gym (49 Gladstone St, Perth) - weights and strength training equipment available for in-person sessions
- Address
49 Gladstone St, Perth WA 6000
- Team
- Tim KarajasHead Coach / Founder
- DebCo-Coach
- Client testimonials
“I was recommended Tim by another running coach, which immediately said a lot about the quality of service Tim offers... the thing I have really valued from the 6 months I have been working with Tim is his genuine desire to educate and empower. There is no attempt to create a cycle of dependecy on his services, but rather a razor sharp focus on tooling me up for the long term to be able to achieve the goals and ambitions I set for myself. It is liberating, fulfilling and most importantly laced with absolute integrity. In the personal training space, that can be hard to find. Tim understands the nuances of the sport of running and has a genuine ability to balance the science with the art. Finally, Tim has remained professional and approachable at all times. I could not recommend Tim and his team any more. 11 out of 10!”
“I first contacted Tim towards the end of 2025 when I was looking for a personal trainer that had experience with elderly clients, and could work with my 80 year old mother. After training with Tim for a few months there has been significant improvements in her functional strength and movements. She has gotten stronger, and feels more steady and confident on her feet. Tim has a lot of knowledge and his expertise is impressive. He has a great ability to connect with people, encourage them, while also gauging their ability in order to adjust exercises and make progress at a comfortable pace. It has been very easy to work with Tim and Deb, they are highly professional, very approachable and communicative. I would highly recommend Extension Fitness.”
“I attended a running workshop with Tim and was given feedback on my form, along with a few simple things to focus on. Was mindful of a couple of variables during my next parkrun and shaved a few minutes off my recent average time. Free speed!”