Ralph Montague, longevity expert, author and founder of The Longevity Clinic in Great Britain, believes that living to 100 isn’t about extreme routines, biohacking, or quick fixes, it’s about self-awareness, consistency, and protecting your energy over time.

“Ageing well is less about trying to reverse time and more about slowing the rate at which damage accumulates,” Ralph explains. “The biggest mistake people make is overcomplicating longevity. In reality, it comes down to how you sleep, move, eat, think, and connect with others, every single day.”

While advanced longevity tools such as red light therapy beds are incredible, especially for those with chronic conditions and pain, Ralph stresses that technology is best  complementing and not replacing, strong foundations. Through The Longevity Clinic, an international provider of longevity devices for clinics and homes, and is regularly invited to speak at international longevity-focused events.

“It’s important to remember that ageing doesn’t happen overnight, and it certainly isn’t a quick fix but with understanding, patience, and the right habits, you really can make meaningful changes that positively impact your future.”

Diet: Simplicity over supplements

Rather than chasing superfoods or investing a lot of money in supplements, Ralph encourages a nutrient-dense, anti-inflammatory diet built around whole foods.

“You don’t need a cupboard full of supplements,” most people would benefit far more from prioritising protein intake, fibre, hydration, and food quality. Vitamin D is one of the few supplements I consistently recommend, particularly in the UK, where we get less hours of sun compared to other contrives alongside supporting gut health through a diverse diet that feeds the microbiome.”

Fermented foods, vegetables, healthy fats, and minimising ultra-processed foods all play a key role in reducing inflammation and supporting long-term metabolic health.

“Highly processed foods spike blood sugar, promote inflammation, and damage metabolic health over time,” Ralph explains. “You can be slim and still metabolically unhealthy if your diet is dominated by ultra-processed foods, so don’t rely solely on the scales to judge your health.”

Exercise: Daily activity beats extreme workouts

Exercise doesn’t need to be intense to be effective. Consistent daily movement can be just as powerful over time as high-intensity training.

“Strength training is essential as we age, but walking is hugely underrated and something I do most days for around 45 minutes,” he says. “Regular walking supports cardiovascular health, joint mobility, mental wellbeing, and longevity. The goal isn’t perfection, it’s consistency.”

He recommends a combination of strength training, walking, balance work, and stretching to protect muscle mass and independence later in life.Movement also plays a crucial role in mental health, which Ralph says is deeply connected to ageing well.

“Exercise, whether gentle or intense, is one of the most powerful tools we have for mental health. A healthy mind helps keep you young.”

He warns that prolonged sitting, particularly common among office workers, accelerates ageing even in people who exercise regularly.

“Extended periods of sitting are linked to poorer cardiovascular health, insulin resistance, and reduced muscle mass,” he explains. “Later in life, this often shows up as back, hip, and knee problems.”

Ralph advises standing up and walking around for at least five minutes every hour, ensuring screens are at eye level, and using a chair that supports the lower back.

Sleep pattern, stress, and mental sharpness

With a background in sleep and energy mastery, Ralph describes sleep as one of the strongest predictors of healthy ageing.

“Poor sleep accelerates ageing faster than almost anything else,” he says. “It affects hormones, immune function, memory, and emotional regulation. Protecting your sleep is one of the most powerful longevity tools we have.”

While not everyone needs exactly eight hours, Ralph says most people thrive on seven to eight hours per night, with anything under six hours being harmful for the majority.

“Sleep is when your body carries out its maintenance and repair work. Skipping it,  or consistently staying up too late,  accelerates ageing at a cellular level.”

To stay mentally sharp, he recommends lifelong learning, reading, problem-solving, and limiting passive screen time.

“Your brain needs challenge and novelty. Curiosity is a longevity habit.”

Chronic stress, Ralph adds, is one of the most overlooked drivers of accelerated ageing.

“Living in a constant state of stress raises cortisol levels, disrupts sleep, affects weight, weakens immunity, and damages cardiovascular health,” stress doesn’t just affect how you feel,  it directly influences how quickly your body ages.”

Social connection: The overlooked longevity factor

Strong relationships are just as important as diet and exercise and commonly overlooked when people start to look into longevity. “Loneliness is as damaging to health as smoking,” people who live longer tend to have strong social bonds, a sense of purpose, and regular interaction with others.”

The strongest predictors of longevity, and how to test them at home

Research shows that simple physical markers such as grip strength, walking speed, and balance are powerful indicators of long-term health and independence, and they’re easy to assess at home.

Grip strength

If you can comfortably open jars, carry shopping bags, and hold objects securely, you’re likely in a healthy range. Grip strength is widely recognised as one of the most reliable indicators of overall health, according to Joshua Davidson, a strength and conditioning researcher at the University of Derby. Grip strength can also be measured at home using a hand grip dynamometer, which is widely available to buy online.

Grip strength can be improved at any age. Davidson suggests using a tennis ball or grip trainer, squeezing at maximum effort for as long as possible and progressively increasing time and resistance.

Walking speed

Time how long it takes to walk 10 metres at a normal pace. Difficulty maintaining speed may indicate declining cardiovascular or muscular health.

Balance

Try standing on one leg for 30 seconds without support. Struggling to balance can signal reduced neuromuscular health and increased fall risk.

“These markers aren’t about perfection,” Ralph explains. “They’re early warning signs, and the good news is they’re all highly trainable at any age.”