Evolving Concepts of Fitness: From Ancient Traditions to the Future

The idea of fitness has always reflected the era that shaped it. In ancient times, it was synonymous with survival. You needed strength to fight, endurance to hunt, and mobility to travel. Fitness was woven into daily life. No separation existed between function and effort.

During more peaceful and industrialized times, physicality became less essential. The aristocratic classes hired others to do manual labour. Comfort became a status symbol, and fitness drifted toward sport, recreation, or aesthetic pursuit. But it never disappeared. In fact, with each cultural shift, fitness reinvented itself.

In the late 19th and early 20th centuries, strength came roaring back. The strongman era captured public imagination; figures like Eugen Sandow performed feats of power that blended art and athleticism. In the 1970s, jogging became the new wave of cardiovascular health. The 1980s brought the rise of aerobics; group classes, leg warmers, and mass participation. Each decade found a new form of expression for the age-old pursuit of capacity.

Today, we’re seeing those threads woven together. Hybrid training is everywhere. One day you’re lifting heavy, the next you’re sprinting, and on the weekend, you’re lining up for a race that blends it all. Fitness is no longer one-dimensional. It’s not just strong or just lean. It’s capable. It’s adaptive. And it’s being tested in new arenas, including fitness races, obstacle challenges, and functional competitions that demand a wide range of skills.

These events don’t just ask, “Are you fit?” They ask, “How many kinds of fit are you?”

Technology has also joined the movement. Heart rate monitors, GPS trackers, sleep scores, and wearable devices provide us with more feedback than ever before. We measure our fitness in numbers now: pace, power, load, reps, distance. These metrics can be helpful. They give structure to the process. They make progress tangible. But they’re not the full story. They tell you what you did, not always how you did it, or why.

Still, modern data has helped us train smarter. We now understand the value of progressive overload. We are aware of the recommended training intensities and volumes that enhance health and reduce disease risk. We’ve come to realise that combining strength and endurance, once thought to cancel each other out, can actually produce superior outcomes when programmed intelligently. These findings are now reflected in the growing popularity of hybrid races, where competitors must move quickly, lift effectively, and endure discomfort across various domains.

Looking ahead, the tools will continue to evolve. We’ll see more integration between technology and training, including AI-generated plans, virtual race simulations, and perhaps even genetically informed programs. But the essence of fitness won’t change. The human body remains a complex biological system, not a machine. It thrives on effort. It adapts to stress. And it responds best to consistency, not shortcuts.

No matter how advanced the tools become, fitness will always be about one thing: using your body to engage with the world. To chase. To carry. To climb. To play. To persist. Fitness is what allows us to experience life more fully.

Because when you’re fit, you’re not just ready for a race.

You’re ready for anything.

Industrius Esto

Jason Curtis

Jason Curtis

Jason Curtis is the founder and CEO of the Deadly Dozen, one of the fastest-growing fitness races in the world, expanding to over 20 countries within just 18 months of launch. Building on this explosive growth, Jason opened the Deadly Dozen Institute of Fitness Racing, a pioneering global hub for training, education, research, and innovation designed to shape the future of the sport. The Institute develops world-class training systems, certifies coaches, and drives the evolution of fitness racing to build the next generation of hybrid athletes.

A former British Army Physical Training Instructor, bestselling author of more than twenty books, and one of the UK’s leading strength and conditioning coaches, Jason owned and operated a thriving strength & conditioning gym for over a decade, coaching hundreds of athletes every week. He is also the founder of the SCC Academy, which has educated and certified over 40,000 fitness professionals and enthusiasts worldwide.

Through the Deadly Dozen, the Institute of Fitness Racing, the SCC Academy, and his weekly Podcast, Jason’s mission is to make fitness racing the most accessible, physically rewarding, and transformative sport on the planet; uniting communities, redefining competition, and empowering millions to train, race, and embrace effort—a philosophy he calls Effortism.

Follow Jason on Instagram: @Jason.Curtis.Official

https://www.jasoncurtis.com
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Fitness as Freedom

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The Purpose of Training: Preparedness and Capability