The Body You Inherited is Built for Scarcity.
Your biology was not designed for modern life.
For most of human history, our ancestors lived in environments defined by:
Food scarcity
Physical effort
Intermittent access to energy:
They didn’t eat three meals a day.
They didn’t snack.
They didn’t have constant access to refined carbohydrates.
Instead, they developed something remarkable: Metabolic flexibility
This is the body’s ability to:
Burn glucose (sugar) when food is available
Switch to fat stores when it isn’t
Like a hybrid car, seamlessly switching between fuel sources.
This flexibility kept humans alive.
It meant:
– Stable energy
– Efficient fat use
– Preservation of muscle and function
The Modern Shift: Abundance Without Adaptation
Fast forward to today
We have the same genes… but we live in a completely different environment.
– Constant access to food
– Highly processed, calorie-dense products
– Minimal physical demand
– Frequent eating (often from morning to night)
A pivotal moment in this shift came in the 1970s
Under Richard Nixon, agricultural policy in the United States began to prioritise:
– Increased food production
– Lower food costs
– Expansion of processed food markets
This supported farmers, but also accelerated the rise of:
– Refined carbohydrates
– Industrial food processing
– Global distribution of low-cost, high-calorie foods
The result?
We moved from periodic eating to constant consumption
And the body never got the signal to switch fuel sources.
The Hidden Problem: Fat Gain and Muscle Loss
This is where things start to go wrong.
When the body is constantly exposed to:
– High insulin levels
– Excess calories
– low physical demand
It adapts, but not in ways that benefit long-term health.
Instead, we see:
– Fat accumulation (especially around the abdomen)
– Loss of muscle mass
– Reduced metabolic rate
– Worsening insulin sensitivity
This combination is sometimes called sarcopenic obesity.
And it’s far more dangerous than weight gain alone.
Because muscle is not just for movement.
Muscle is:
– A key regulator of metabolism
– Essential for glucose control
– Critical for long-term strength and independence
Lose muscle, and the entire metabolic system begins to decline.
Why Traditional Advice Often Fails
Many people respond by:
– Eating less
– Doing more cardio
– Focusing only on the number on the scale
But this can make things worse.
Without the right strategy:
– Your metabolism slows further
– You may lose more muscle than fat
– Weight loss becomes harder to sustain
This is why so many people say:
“I’m trying, but nothing is working.”
The Solution: Rebuild Metabolic Flexibility
The goal is not extreme dieting.
It’s restoring what your body was designed to do: Metabolic flexibility
And that comes down to three key pillars:
1. Whole, Unprocessed Food Focus on:
– Protein-rich foods
– Natural healthy fats
– Fibre-rich vegetables
– Minimally processed carbohydrates
This helps:
– Stabilise blood sugar
– Reduce insulin spikes
– Support muscle maintenance
2. Intermittent Periods Without Food
Not constant eating.
But structured breaks:
– Allowing insulin levels to fall
– Encouraging fat utilisation
– Restoring metabolic switching
This doesn’t need to be extreme.
Even modest fasting windows can make a difference.
3. Physical Activity (Especially Resistance Training)
Movement is not optional; it’s a metabolic signal.
In particular:
Resistance training preserves and builds muscle
Walking and daily activity improve insulin sensitivity
This tells the body:
“This muscle is needed. Please don’t lose it.”
The Take-Home Message
Weight alone is a poor measure of health.
You could be:
The same weight
or even lighter
…but metabolically worse off.
The real question is:
Are you preserving muscle… or losing it?
Are you burning fat… or storing it?
Because once you understand this, everything changes.
Final Thought
Your body is not broken.
It is responding perfectly to the environment you place it in.
The challenge is that modern life is no longer aligned with your biology.
But the solution is not complicated.
It is a return to principles that your body already understands:
– Real wholefood
– Periods of not eating
– Regular movement
Do that consistently, and you don’t just lose weight.
You restore function!
If you found this discussion useful, you may be interested in my book, “Your Metabolic Shift”, which explores these concepts in greater depth.
References
– Wolfe RR. The underappreciated role of muscle in health and disease. Am J Clin Nutr. 2006.
– Srikanthan P, Karlamangla AS. Muscle mass index as a predictor of longevity. Am J Med. 2014.
– DeFronzo RA. Insulin resistance and metabolic syndrome. Diabetes Care. 2010.
– Longo VD, Panda S. Fasting, circadian rhythms, and time-restricted feeding. Cell Metabolism. 2016.
– Booth FW et al. Waging war on modern chronic diseases: primary prevention through exercise biology. J Appl Physiol. 2012.
– Cordain L et al. Origins and evolution of the Western diet. Am J Clin Nutr. 2005.
– Ludwig DS, Nestle M. Can the food industry play a constructive role in the obesity epidemic? JAMA. 2008.
– Taubes G. The political science of obesity. BMJ. 2013.
