An April 2021 study by Baycrest's Rotman Research Institute said, 

"Scientists already know that exercise has a positive impact on the brain, but our study is the first to show that the same may be true for household chores," 

"Understanding how different forms of physical activity contribute to brain health is crucial for developing strategies to reduce the risk of cognitive decline and dementia in older adults."

"Besides helping to guide physical activity recommendations for older adults, these findings may also motivate them to be more active, since household chores are a natural and often necessary aspect of many people's daily lives, and therefore appear more attainable,"