Here's something that keeps me awake at night: Right now, someone is sitting in traffic, perhaps on the M25, perhaps on their daily commute to work, and their lungs are 15 years older than they think. They won't know it for another decade. By the time they're breathless climbing stairs at 65, they'll have already lost 40% of their lung function. And the truly maddening bit? We could have told them at 50. I've spent the last ten years developing technology to address this issue, and what I've learned has fundamentally altered my perspective on respiratory health. It's not that we lack the science to understand lung ageing, we've had robust equations and validation studies for decades. The problem is far simpler and far more stubborn: we're measuring the right thing in the wrong place at the wrong time. Let me explain.

The Invisible Epidemic Nobody's Talking About

We all accept that our bodies age. Grey hair, reading glasses, the occasional creak in the knees, these are visible, tangible reminders. But your lungs? They're ageing too, and unlike your hairline, you can't see it happening until it's already done considerable damage.

The research here is unambiguous. Studies using data from the Third National Health and Nutrition Examination Survey show that the lung age deficit, the gap between your chronological age and your lungs' biological age, begins to accelerate in your twenties if you smoke, with a rapid acceleration thereafter [1]. But here's what caught my attention: even in never-smokers with normal spirometry, there's remarkable variability. Some people are born with Olympic-level lungs, while others start behind the curve. And none of us know which category we're in unless we test.

The cellular story underneath makes this urgency even more compelling. As lungs age, they undergo profound changes, including decreased elastic recoil, increased airspace dilation and altered immune responses [2]. The fascinating, and slightly unsettling, bit is that many of these changes mirror what we see in chronic obstructive pulmonary disease (COPD). Ageing itself accelerates lung disease. Disease accelerates ageing. It's a continuum, not a binary.

Yet, for most people, their first spirometry test happens when they're already symptomatic. By then, we're managing decline, not preventing it.

The Gap: Why Annual Check-Ups Aren't Enough

Let me put this in terms that resonate with my engineering background. Imagine checking your bank account once a year or even once every three years. You might notice if you've gone bankrupt, but you'd miss every trend, every warning sign, every opportunity to course-correct. That's what we're doing with lung function.

Traditional spirometry is brilliant; it's the gold standard for a reason. However, it requires specialised equipment, a trained technician to guide you through forced maximal exhalations, and a clinical setting. For home monitoring, the adherence challenge is a genuine concern. Ask any respiratory physician about home spirometry compliance, and they'll tell you: without encouragement, patients struggle to perform the manoeuvres correctly, which means that the data is often unreliable.

But here's where the science gets interesting. Recent research on spirometric-derived lung age (SDL age) has revealed a remarkable finding: once a measurement system is calibrated to an individual, it achieves significant internal consistency [3]. You're not trying to compare Patient A to population norms, you're comparing Patient A today to Patient A last week. That's a fundamentally different paradigm.

The Japanese Respiratory Society, building on decades of work refining lung age equations, has demonstrated that tracking lung age over time can detect trends far earlier than waiting for absolute FEV₁ values to drop below clinical thresholds [3]. One study noted that with frequent measurements, decline patterns can be identified in months rather than the 2.5 years typically required with annual spirometry [3].

Think about what that means. For someone with early COPD, interstitial lung disease, or accelerated ageing due to occupational exposure, we can see the curve changing in near real-time. This would enable us to intervene when it actually matters.

The Automotive Revolution You Haven't Heard About

Now, let me bring this back to where I started: that person sitting in traffic.

The automotive sector has undergone a remarkable transformation over the last decade. Modern vehicles monitor driver drowsiness through steering patterns, track stress through heart rate variability measurements, and even adjust cabin environments based on biometric feedback. The connected car isn't science fiction, it's in your garage.

But here's what nobody's talking about: the most significant health threat in your car isn't your driving. It's what you're breathing in.

Traffic pollution, cabin air quality, and cumulative exposure over years of commuting can have measurable impacts on lung function. And while your car knows when it needs an oil change, it has no idea that your lungs are ageing faster than they should be.

Imagine a different scenario. You're driving to work, and your vehicle prompts you for a 60 second breathing assessment. You breathe normally, no forced exhalations, no complex manoeuvres, while a camera captures chest wall movement and respiratory patterns. The system analyses your lung age, compares it to your baseline from last week, and correlates it with route selection and cabin air filtration performance.

If your lung age is trending upward, the system gently suggests: "Your respiratory health markers have changed. Consider scheduling a check-up." Not alarmist. Not medical advice. Just data-driven awareness.

For automotive companies exploring in car health and wellness as a service, this is no mere futurism. The technology exists. The validation studies exist. What's needed is the will to implement it.