More time spent on your feet appears to lengthen bits of DNA called telomeres. Telomeres, which protect the end of chromosomes (like the tips that keep shoelaces from fraying), tend to get shorter and shorter until they can’t shorten any more, causing cells to die.
“Our data indicate that lengthening of our telomeres may be one mechanism that induces health benefits after lowering sitting time in elderly people.” Said lead researcher Per Sjogren, an associate professor in the department of public health and caring sciences at Uppsale University.
“One should, of course be careful with the conclusions, since our study is rather small and needs to be confirmed in larger trials,” Sjogren said.
However, this is the first study describing a possible relationship between physical activity and lengthening of telomeres, according to Sjogren.
“Telomeres have attracted a lot of interest in the last few years because they are situated at the end of our chromosomes and have shown to be important for DNA replication and cell survival. The interest of whether telomeres may affect health and longevity has increased,” Sjogren said.
Telomeres stop chromosomes from fraying or clumping together and scrambling the genetic codes they contain, the researchers noted.
Why spending less time sitting might lengthen telomeres isn’t known. “That is a valid question that remains to be resolved.” Sjogren said.
