Why Your Body Feels This Way (And Why It's Not Your Fault)

2022 — Fat Loss Phase2023 — Building Muscle2024 — The Full Picture

If you read Part 1, you know this feeling is real and it is not a sign of weakness.

Now let's talk about why it is happening — because understanding the cause is the only way to fix it properly.

It Is Not Age. It Is Adaptation.

This is the most important thing I can tell you: your body is not suddenly falling apart after 35.

It is adapting.

Your body is always responding to its environment. When you sit for ten hours a day, it adapts to sitting. When you eat low protein, it adapts by preserving fat and reducing muscle. When you sleep poorly and carry chronic stress, it adapts by keeping cortisol elevated — which raises blood sugar, increases fat storage around the abdomen, and suppresses recovery.

These are not diseases. They are logical responses to modern life.

In Indian working life, this pattern is especially common: long hours sitting, late-night screen use, delayed dinners, poor sleep, and mornings built around tea, biscuits, toast, poha or paratha rather than protein. Then people wonder why their energy is unstable, their waistline keeps growing, and the gym alone does not fix it.

The research is clear on this. A landmark 2019 paper in Nature Medicine by Furman et al. showed that chronic low-grade inflammation — driven by poor diet, disrupted sleep, sedentary behaviour, and sustained psychological stress — is a root driver behind conditions including type 2 diabetes, cardiovascular disease, and neurological decline.

Your body does not break down randomly. It responds to signals. Change the signals, and the body responds differently.

What Modern Life Is Actually Doing To You

Let me be specific about the mismatch.

You were designed to move throughout the day. Your ancestors did not have a two-hour gym session and then sit for the remaining 22 hours. Movement was woven into daily life — carrying, walking, squatting, lifting, climbing. Today most adults take fewer than 5,000 steps a day and sit for 9 to 11 hours. The body interprets prolonged sitting as a signal to downregulate metabolism.

You were designed to eat whole, minimally processed food with adequate protein. The modern diet — high in refined carbohydrates, seed oils, and ultra-processed food — is metabolically disruptive in ways that whole food diets simply are not. Protein is chronically under-consumed by most adults over 35, which directly accelerates muscle loss (sarcopenia — the medical term for age-related muscle decline).

You were designed to sleep 7 to 9 hours in alignment with natural light cycles. Artificial light, screen use after dark, and the cultural glorification of busyness have made poor sleep almost universal. Sleep researcher Matthew Walker describes chronic short sleep as a significant driver of metabolic disease, cognitive decline, and immune dysfunction.

You were designed to have periods of genuine rest. Chronic psychological stress — the relentless background pressure of modern professional life — keeps the hypothalamic-pituitary-adrenal axis (your stress response system) in a low-level state of activation. This is not dramatic acute stress. It is sustained, quiet, and very damaging over years.

A lot of people are not just physically tired. They are mentally switched on from the moment they wake up to the moment they finally put the phone down, and that keeps recovery permanently half-finished.

Why I Know This From the Inside

When I returned to India in 2020, I was not in terrible shape. But I was not in good shape either.

Looking back honestly at what my life looked like then: regular alcohol, a high-carbohydrate diet with very little protein, minimal deliberate movement, irregular sleep, and the significant stress of an unexpected career disruption and a parent's serious illness.

Every one of those factors was working against me simultaneously. And I had been living that way for years.

When I look at the photo from 2022 — my early fat loss phase — what I see is someone who had started removing the things that were working against him. I had stopped drinking. I had started walking more. I had begun lifting weights consistently for the first time. But I still had not figured out protein. My diet was still too carbohydrate-heavy. My belly fat reflected that precisely.

The science I was reading was not abstract to me. I could see it in my own body.

Why the Gym Alone Does Not Fix This

This is the most common mistake I see in people over 35 who hire me.

They are training hard. Sometimes very hard. But they are building on an unstable foundation. And they wonder why their results plateau, why they are always slightly injured, why their energy is inconsistent.

Here is the problem. Exercise is a stress on the body. A good stress — but a stress nonetheless. For that stress to produce adaptation (stronger muscles, better cardiovascular fitness, improved body composition), your body needs to recover from it.

Recovery requires sleep. Recovery requires protein. Recovery requires manageable background stress levels. Recovery requires adequate daily movement to keep circulation and metabolic rate active.

If you are sleeping six hours, under-eating protein, carrying high chronic stress, and sitting for most of the day — your training session is adding another stress load on top of a system that is already struggling to recover.

This is not a motivational problem. It is a systems problem.

The Specific Signals That Drive Belly Fat After 35

I want to be direct about this because it is the number one thing people ask me about.

Abdominal fat accumulation after 35 is primarily driven by four signals: elevated cortisol (chronic stress), insulin resistance (from a high-carbohydrate, low-protein diet), poor sleep (which disrupts leptin and ghrelin — your hunger-regulating hormones), and insufficient muscle mass (which reduces your resting metabolic rate).

All four of these are lifestyle-driven. All four can be changed.

When I eliminated alcohol, reduced processed carbohydrates, dramatically increased my protein intake (eggs became my cornerstone — I was eating ten or more a day during my muscle-building phase in 2023, plus meat daily), and started taking sleep seriously — the belly fat came off. Not in six weeks. Over two years. But it came off, and it has stayed off.

What This Means for You

You are not fighting your age. You are recalibrating your environment.

The symptoms you feel — the stiffness, the weight, the fatigue, the blood markers trending in the wrong direction — are not permanent features of being over 35. They are signals from a body that is adapting to inputs it was not designed for.

Change the inputs. The body responds.

Part 3 tells you exactly how.

Sources

• Furman, D., et al. (2019). Chronic inflammation in the aetiology of disease across the life span. Nature Medicine.
• Pontzer, H., et al. (2016). Constrained total energy expenditure and metabolic adaptation to physical activity in adult humans. Current Biology.
• Walker, M. (2017). Why We Sleep. Scribner.
• Levine, J. A. (2002). Non-exercise activity thermogenesis. Best Practice and Research Clinical Endocrinology and Metabolism.

— Shiva Malhotra, Barefoot Protocol

ACE Certified Personal Trainer | Sydney, Australia