About Antifragile Athlete


Welcome to Antifragile Athlete!

We believe that age is just a number and everyone has the potential to transform themselves. As a biokinetics and strength training company, we are more than just trainers – we are mentors on a self-discovery journey beyond traditional fitness.


Our story begins with you. You're a successful businessman in your 60s who has sacrificed your health and well-being for your career. You've experienced the physical toll of stress and age, but you want to lead an active and fulfilling life professionally and personally.


At Antifragile Athlete, we understand your unique challenges and dreams. We know that the fitness world can be intimidating, especially when it seems like it's only for the young and extremely athletic. That's where we come in.


Our strength lies in creating customized training programs specifically tailored to your needs. We specialize in biokinetics and strength training and know how to help you overcome any obstacle. We're here to help you grow and become mentally and physically stronger.

At Antifragile Athlete, our ultimate goal is to make you more resilient, not just stronger. We want to help you transform into an Antifragile Athlete – adaptable, strong, and resilient.


The principles you learn here will permeate all areas of your life.


If you're ready to prioritise your health and challenge yourself, join us at Antifragile Athlete. We're here to be your mentor and guide you every step of the way. Welcome to Antifragile Athlete – where we embrace the potential in every challenge.

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Hi, I'm William Ainslie…

Throughout my professional journey, I have always strived to turn challenges into opportunities for others. As an experienced Biokineticist, I specialise in transforming injuries and limitations into health and strength. My focus extends beyond rehabilitation to prevention, ensuring you avoid setbacks on your path to fitness.


My story began with vulnerability as I was born with a congenital fusion of my lower back vertebrae, leading to severe spasms. However, I found resilience and strength in biokinetics, which fueled my passion for helping you overcome physical challenges. This experience led me to earn my honours in Biokinetics in 2002.


My successes, including winning the African Olympic Weightlifting Championships in 2006 and competing in numerous world championships, have taught me the true value of strength and tenacity. My love for simplicity and resilience forms the heart of the support I bring you at Antifragile Athlete.


Despite my accomplishments, I openly share my vulnerabilities. I have insecurities and sometimes seek validation, but these human elements make me a better companion on your fitness journey. My openness fosters a deep connection and trust with you, my clients.


I am passionate about working with individuals over 55 and dedicated to giving you a renewed lease on life through fitness. I aim to empower you, enabling you to value your body, enhance your performance, and boost your self-confidence. My approach is straightforward and accessible, ensuring profound improvements in your health.


I am currently exploring the world of powerlifting and striving to expand my limits while keeping my health and safety in mind. The Antifragile Athlete philosophy emphasises the value of simplicity, the ability to withstand challenges, and the potential to turn weaknesses into strengths. Let's join forces and embark on a fitness journey together.

Antifragile Athlete is a specialised virtual program based on Physical therapy, Biokinetics & Strength training principles for serious men over 60.

+27-83-258-9134

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William Ainslie created Antifragile Athlete with © systeme.io