Midlife Telomere Length May Reflect Stress and Chronic Disease More Than Physical Fitness

Telomeres are protective structures at the ends of chromosomes. They help protect genetic material during cell division and generally become shorter as cells divide over time.

Telomere length is often investigated as one possible marker of biological ageing. Researchers have also explored whether chronic stress, physical activity, sleep and disease may influence telomere measurements.

In the newly reported study, researchers in Lithuania measured telomere length in blood samples from 84 adults. Most participants were middle-aged, with an average age of approximately 51 years.

The researchers examined relationships between telomere length, perceived stress, chronic disease, lifestyle characteristics and physical function.

They reported associations between telomere length and perceived stress and chronic disease, but did not find similar associations with physical fitness or lifestyle measures in this small sample.

The findings suggest that cellular ageing is complex and may not be adequately represented by physical fitness alone. However, the study's small sample size and cross-sectional design mean that it cannot establish cause and effect.

Regular exercise remains important for cardiovascular health, muscle strength, mobility, metabolic health and psychological wellbeing, even if this particular study did not find a relationship with telomere length.