Just as your memory can recall certain events from the previous day or year, your body can also remember movement patterns, which is referred to as muscle memory.
Muscle memory is stored in your motor neurons through repetitive movements, which means your body doesn’t have to create new neural connections, rather it ‘retrieves’ and strengthens previous ones. Plus, once a muscle has been pre-stretched, it’s much easier to build back up again.
Research even shows how exercise, including strength training, creates adaptive changes in the nervous system. This means that within a month or two of getting back into a similar routine, you can easily regain muscle strength and size, which is good news for those of us that were fit ‘back in the day’ but have let things slide over time.