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https://www.businessinsider.com/benefits-of-regular-exercise-2018-1

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https://www.businessinsider.com/what-over-exercise-does-body-brain-health-2018-4

https://www.nature.com/articles/d41586-021-00817-2

https://www.livestrong.com/article/262328-does-stretching-help-muscle-growth/