When we think of lifting weights, we often picture sculpted physiques, personal bests, or building strength for athletic performance. But beyond the visible gains, resistance and weight training offers something far more profound: a pathway to a longer, healthier life.

At its core, training for longevity is about building a resilient body and mind, that can carry us well into our later years. We sat down with One Playground coaches, Jennifer Webb and Robi McDonald, to dive into the long-term benefits of resistance training and why it might just be one of the most powerful forms of preventative medicine.

Stronger Bones = Stronger Future

As we age, our bone density naturally declines, increasing the risk of fractures and osteoporosis. Starting around the age of 40, individuals can lose approximately 1% of muscle mass per year, which accelerates after the age of 60. Regular resistance training helps counteract this decline by stimulating muscle growth and enhancing strength. Resistance training applies stress to bones, helping them to grow denser and stronger over time, which means a reduced risk of injury as you age. Jen tells us “The mechanical stress is what keeps bones dense and resilient – and strength training is one of the most effective ways to guard against age-related injuries”. 

Immunity and Disease Prevention

Lifting weights not only strengthens your muscles - it also boosts your immune system. The physical stress of training triggers the body to repair, adapt, and regenerate. When supported with adequate recovery, this process increases red and white blood cell production, which in turn strengthens our body’s immunity.
“Strength training is one of the most under-utilised tools we have for longevity,” says Jen. “It’s not just about aesthetics or strength, it’s about improving how your body functions on a daily basis, how it handles stress, and how resilient it is.”

Additionally, studies show resistance training helps to reduce the risk of non-communicable diseases like type 2 diabetes, cardiovascular disease, and even some cancers. And if illness does occur, people with more muscle mass and metabolic health often have more positive health outcomes.

More Muscle, More Mobility

Muscle mass plays a crucial role in everything from balance to metabolism. More muscle supports healthy joints and mobility, helping you stay agile, independent, and aging gracefully.

Grip strength and leg strength, which are two key indicators of overall health, are now recognised as strong predictors of longevity. “Grip strength and leg strength are two of the strongest predictors of how well you’ll age,” explains Robi. “If you want to move well and reduce the risk of injury, lifting weights isn’t optional - it’s essential.” One of the highest risk factors for non-communicable diseases is low grip strength and low leg strength. In other words: keep lifting, and you’re likely to live longer and move better.  

Mental Health and Emotional Resilience

As Coach Robi shared from personal experience, resistance training doesn’t just change your body - it can transform your life. Robi shares, “My mental health was at its worst when I was least active. I was sleeping terribly, eating poorly and stuck in negative patterns”. During one of the lowest points in his mental health journey, Robi prioritised weight training began to see a shift. Robi went on to complete an ultramarathon and an Ironman within a couple of years. “The more I trained, the better I slept. I made better food choices, and I found a more positive social circle. Strength training helped me to transform my life and manage depression without medication—that was life-changing for me.”

There’s also growing evidence that the more physically active you are, the more resilient you become both mentally and emotionally. People who train regularly are often better equipped to handle stress, anxiety, and depression.

Training for Longevity

Jen explains that you don’t need to train every day to reap the benefits. Just 3–5 sessions per week of strength training is enough to make a real difference. “You don’t need to train for hours and hours, try to keep sessions from 45-90 minutes including a warm-up, mobility, and cooldown. This is more than enough to see great results”. Robi says, “Of course one session is better than none, two sessions are better than one and so on! Strength training will have a significantly positive effect on quality of life in the long term so it’s worth making time to prioritise a couple of sessions every week”. 

Jen recommends focusing on a mix of training styles, including low reps and heavy weight to build strength, higher reps to improve endurance and cardiovascular health, and training the core movement patters like push, pull, squat and hinges. 

Robi reminds us, “Don’t forget about aerobic work. Just one hour per week of Zone 2 cardio can significantly improve heart health. Zone 2 cardio is cardio that allows you to maintain a conversation while exercising. Hitting 10,000 steps a day is one of the most effective prescriptions for preventive health and something that we strongly recommend to our clients”. 
 
Although exercise and strength training are important, diet is a factor that cannot be overlooked when it comes to longevity. “Consistency matters more than perfection, so forget the myth that any one food or superfood will make or break your health and longevity”, explains Robi. “The best diet is balanced and sustainable with a mix of animal protein, fruits, vegetables, whole grains and healthy fats. If you’re eating well 80-90% of the time, you’re in a good spot for your health”. 
 
The Bottom Line

Resistance and weight training isn’t just for athletes and bodybuilders - it’s essential for anyone who wants to live a longer, stronger, and healthier life. As Jen put it, “There are a plethora of health benefits associated with strength training – it’s one of the most powerful tools we have to reach an elevated health status”. From disease prevention to better mental health and improved quality of life, strength training simply cannot be overlooked. 
 
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