For decades, Arnold Schwarzenegger built his legacy on strength.
Seven Mr. Olympia titles. One of the most iconic physiques in history. A career defined by lifting heavier, pushing harder, and redefining what the human body could look like.
But now, years removed from competition, Schwarzenegger is shifting the conversation — and challenging one of fitness culture’s most ingrained beliefs. Because, according to him, strength alone isn’t enough.
In a recent newsletter to his followers, Schwarzenegger turned his focus toward longevity, highlighting a factor he believes is even more important than how much weight you can lift: muscle power.
And the numbers behind it are hard to ignore.
“Number You Won’t Forget: 6-7X. Do you train for muscle power? Here’s why you should,” Schwarzenegger began. “You might think being strong is the best way to protect your health as you age. But new research suggests that how fast you can move with strength is even more important than how much you can lift.
“People with low muscle power face roughly 6 to 7 times the risk of early death compared to those with the highest power levels, even after accounting for age, body composition, and chronic disease history.”
It’s a striking claim — and one backed by long-term research.
Schwarzenegger pointed to a study tracking nearly 4,000 adults over more than a decade, where scientists compared traditional strength with muscle power — essentially how quickly someone can apply force.
“Scientists tracked nearly 4,000 adults for more than 10 years to determine whether muscle strength or muscle power predicted better longevity. They measured power using an explosive upper-body rowing movement adjusted for body weight, and strength using a handgrip test,” the Austrian Oak wrote.
The results drew a clear line between the two.
“When researchers sorted participants into groups based on their relative muscle power, those in the lowest-performing group had roughly 6 times the risk of death among men and 7 times the risk among women compared to those with the highest power levels,” he continued. “Muscle strength, by contrast, did not reach statistical significance as a predictor of mortality after full adjustment for other health factors.”
In simple terms: explosively and actually being able to move quickly matters more than just being able to move heavy weight slowly.
And that distinction becomes even more important with age, as Arnie explained: “This matters because muscle power declines faster with age than strength does, and it’s what you rely on every time you react quickly, stabilise yourself, or move dynamically. Having adequate power can help you avoid falls, recover your balance, and move with more confidence, which translates into a lower risk of injuries and chronic diseases.”
It’s a shift in perspective from the traditional gym mindset — one that very often prioritises maximum lifts and raw strength numbers. Nevertheless, Schwarzenegger’s message is clear: “You can’t just be strong, you need to be fast and powerful.”
For those wondering how to actually train for that, the answer isn’t necessarily lifting heavier. Instead, it’s about intent – and Arnie shared the sort of exercises he believes you should be focused on.
“To improve muscle power, you don’t need to train like an Olympic athlete, and you don’t have to focus on maximum weights either (that’s more related to strength). But you do need to move with intent and speed: think explosive squats, presses, and rows; medicine ball throws; kettlebell swings; or speed push-ups.”
And perhaps most surprisingly, going lighter might even be more effective, as he writes: “Research suggests that lighter loads (think 30–40% of your max effort) moved with the intention of moving as fast as possible can be as effective, or even better, for developing power than heavy, slow lifting. What matters most is the intent. Even if your actual movement speed is limited, trying to move explosively still trains your neuromuscular system to produce force more quickly.
“If you want to age well, you have to move like you mean it.”
For Schwarzenegger, this isn’t just theory — it’s personal. Now focused on living beyond 100, his approach to training has evolved. Strength is still part of the equation, but it’s no longer the sole priority. Longevity, mobility, and quality of life have taken centre stage.
And that means adapting.
Featured image credit: Instagram/@schwarzenegger
