HEALTHY LIVING . GUIDE



Taking a month or two off of regular exercise may not be so benign. A new small study shows that when muscles take a break, they maintain very little muscle memory from the prior exercise.

The goal of the new study, published Thursday in the journal PLOS Genetics, was to gain a better understanding of how exercise influences the body on a genetic level. Exercise carries a whole host of benefits for the body, from aging to brain health to a stronger ability to fight infections. But how that exercise translates to changes in genetic activity is more unknown.

Taking a month or two off of regular exercise may not be so benign. A new small study shows that when muscles take a break, they maintain very little muscle memory from the prior exercise.

In the report, 23 people trained one of their legs for three months by kicking and pulling a bike-like contraption 60 times a minute for 45 minutes. They did this training four times a week for three months. After that, the people in the study took nine months off. The study authors took skeletal muscle biopsies from both legs before and after and found that the cells in the muscles expressed over 3,000 genes in different ways after a person exercised. However, after the fitness hiatuses, the scientists could not detect any exercised-related genetic changes between their trained and untrained legs.






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