A clear picture of how your child is developing — and exactly what to work on next.
A structured performance assessment for athletes aged 12–18 in Leigh Woods, Bristol, with clear results explained in plain English.
2 Hours · Strength · Power · Movement · Fitness
Why it matters
Young athletes
change fast.
Growth spurts, shifting training loads, technique, and the simple unpredictability of adolescence all shape how a child's body is adapting to their sport — and it isn't always obvious, even to an attentive parent or coach, exactly what a child needs physically at any given point.
K Performance gives you a clearer picture: a structured read on where your child's physical development actually stands, and the specific things worth focusing on next — whatever sport they play.
I work particularly with junior rowers and rugby players, with testing focused on physical qualities that support athletic development across different sports.
What actually happens
One session. A structured read on where your child stands.
A structured assessment in Leigh Woods
Based in a dedicated testing space, with nearby Ashton Court used for the endurance test. You're there throughout.
Strength, symmetry, power, and movement
Left/right strength symmetry using a force dynamometer, jump and sprint performance, a movement screen, and a fitness test scaled to your child's own sport.
A written report — not just numbers
Two genuine strengths, the three things most worth working on next, and why those three specifically. Something you can hand straight to their coach, or simply keep for yourselves.
In the report
- —Two genuine strengths, named specifically
- —The three priorities most worth working on next
- —Why those three, explained in plain English
- —Numbers with context — not just a printout
Prices
Simple, transparent pricing
Performance Assessment
£75
About 2 hours of testing, plus a four-page written report with your child's priorities, written to share with their coach.
Retest
£50
The same tests and protocol, usually 8–12 weeks later, with a report comparing against last time.
Assessment + 8-week programme + retest
£180
The assessment, an individual 8-week training programme built from the results with regular check-ins, and a retest at the end. For athletes who don't already have a strength and conditioning coach.
Sports massage for under-18s: £45. Soft tissue therapy for young athletes, with parent or guardian consent.
Adult sports and remedial massage (50 minutes, £55) is available on Friday afternoons at Kliniko, Long Ashton Business Park, from November 2026. More about sports massage and booking
About
Hi, I'm Mike — I've spent years coaching young athletes
Mike Katholnig has spent years coaching young athletes directly — including junior strength & conditioning work at City of Bristol Rowing Club, working with 12–18 year olds across full training cycles. That's where this assessment actually comes from: not a generic test battery, but a structured way of identifying the things years of hands-on coaching taught him to look for.
Mike is also a Soft Tissue Therapist, offering sports and remedial massage on Fridays: mornings at Bristol Osteopaths, Queen Charlotte Street, and from November, afternoons at Kliniko, Long Ashton Business Park.
- • Level 3 Personal Training
- • Advanced Personal Training
- • Level 5 Diploma Soft Tissue Therapy (Sports Therapy Association registered)
- • Level 2 British Rowing Coach
- • Fully insured
Safeguarding & working with under-18s
Enhanced DBS checked (including the children's barred list) and British Rowing safeguarding trained. Parents and guardians are welcome at every session. For safeguarding and transparency, communication is normally through the parent or guardian, with the young person involved in conversations about their assessment and training.
7+ Years
Coaching young athletes — including junior S&C at City of Bristol Rowing Club.
FAQ