Strength Training for Runners 40+: 3 Common Mistakes and How to Fix Them

If you are over 40 and you run, there is a high chance that you are either doing your strength training the wrong way or, even worse, not doing it at all.

The good news is that, with a few simple adjustments to your weekly routine, you can run more safely, reduce your risk of injury, and increase your longevity in the sport you love.

What changes in the body after 40?
From the age of 30 onwards, our bodies begin to lose muscle mass progressively, in a process associated with sarcopenia.

This loss accelerates with age, with natural hormonal decline, and with the lack of adequate stimulus.

And the result? It becomes increasingly difficult to build muscle, maintain strength, and fight that natural decline.

That is why strength work for a runner in their 40s, 50s, or 60s cannot be the same as for someone in their 20s or 30s.

The body has changed, and training has to change with it.

The 3 most common mistakes runners over 40 make

Mistake 1: Thinking running is your strength training
When we are younger, the body can handle more. But after 40, that logic stops working. Running alone is not enough to stimulate the maintenance of muscle mass. You need specific days dedicated to strength training. There are no shortcuts.

Mistake 2: Training only with bodyweight
Bodyweight exercises have their place, but they do not create enough load to fight sarcopenia. To break that cycle of muscle loss, the body needs progressive resistance, weights, barbells, kettlebells, or machines. Without load, the muscles continue to weaken.

Mistake 3: Using mini bands as your only strength method
Elastic mini bands are excellent pre-workout activation tools, especially for activating the glutes before a quality session such as intervals or a long run.

But they cannot be the foundation of your strength training. They should complement loaded training, not replace it.

How many times per week should you do strength training?
The short answer: 3 times per week.

Two weekly sessions can be enough during very intense marathon preparation phases, but during base periods or when your volume is below 50 km per week, three sessions are the minimum recommendation.

The biggest challenge is fitting strength training in without compromising recovery. The golden rule is:

Avoid training your lower body the day before a hard run, such as intervals, threshold work, or a long run. Ideally, strength training should happen on the same day as your run, for example, running in the morning and gym work in the afternoon.

When you do strength training after a run, the dominant muscles are already fatigued and the body recruits the stabilizing fibres that usually stay in the background.

It is a double benefit in one day.

The golden rule for runners over 40
Loaded strength training, 3 times per week, preferably combined with running days.

This is the formula that will keep you on the road or on the trail for many years.

This is not about looking like an Olympic athlete. It is about preserving your body, staying away from injuries, and making sure you can still lace up your running shoes 20 years from now with the same passion you have today.

In other words, you need to invest in your sporting future.

Running can be a lifelong sport. But for that to happen, strength training has to be a priority, not an option. Your body after 40 needs more stimulus, more recovery, and more care. Give it what it needs, and it will reward you with many more miles ahead.

Do you have questions about how to structure your strength plan? You can buy this product and we will create a personalized program based on your profile, the equipment you have available, and your goals.