Is strength training still safe and worthwhile after the age of 70?

Strength training after the age of 70 is not only safe, but also one of the most powerful tools against the age-related loss of muscle mass and muscle strength, known as sarcopenia. Multiple systematic reviews and a position statement from the National Strength and Conditioning Association show that people over 60 increase the strength of their upper limbs by an average of around 15 kg and their leg strength by an average of 48 kg. Handgrip strength, a widely used indicator of overall health, rises by an average of 1.35 kg. This constitutes solid clinical evidence.

Beyond its effects on muscle, strength training is also demonstrably effective for fall prevention and the performance of daily activities. Standard tests such as the Timed Up and Go (rising from a chair, walking, and sitting back down) showed significant improvement. Notably, even a low training volume, meaning few sets and exercises per week, proved sufficient to improve physical function, lean mass, and muscle growth. Older adults therefore do not need to follow an exhausting programme to obtain most of the health benefits. For maximum strength gains, however, a higher volume is needed.

In the areas of quality of life and mental health, outcomes are positive but varied. Strength training reduced depressive symptoms (with a mean effect of SMD -1.13) and improved mental health, but no effect was found for vitality or the overall quality-of-life score. The researchers themselves emphasise that more evidence is needed before firm conclusions can be drawn in this domain. Descriptive evidence also points to beneficial effects on blood sugar, blood lipids, and cholesterol, although these have not been quantitatively substantiated in the available studies.

There are nuances regarding training intensity that are important for safety. Training heavy at 80 to 90 percent of maximum load produces additional gains in maximal strength and the rate at which force is generated, which is crucial for fall prevention. The authors of this narrative review state that the risk is relatively low, but this is not a randomised study, so caution is warranted. There is also a safety consideration: traditional heavy strength training can reduce arterial compliance by approximately 20 percent. For people who wish to avoid or cannot use heavy weights, blood flow-restricted training with light loads (20 to 30 percent of maximum) offers a well-researched alternative that produces comparable muscle gains.

Adding creatine supplementation to strength training provides older adults with additional benefits beyond strength training alone: greater lean mass, better scores on bench press and leg press strength, and improved performance on a functional chair-stand test. Not all strength exercises showed this difference. The available meta-analysis includes only 357 participants, which means this evidence must be described as moderate and warrants further confirmation. Finally, in a small study (45 participants), strength training also reduced biological markers of oxidative stress damage and improved antioxidant defence, but a single small study is insufficient for a robust conclusion.