BBC authors Alessia Franco and David Robson look at the latest research on the benefits of outdoor play and getting dirty in their article How Mud Boosts Your Immune System. They reiterate that “Findings show that outdoor exercise is not only beneficial because of the chance to roam free – but that certain natural materials, such as soil and mud, also contain surprisingly powerful microorganisms whose positive impact on children's health we are only beginning to fully understand.”
The article looks at studies that not only define the mental restoration and well being effects of spending time outdoors, but also the positive way non-infectious organisms train and boost our immunity and overall health.
They go as far as to propose: “With future research, it may be possible to enrich the soil in house gardens and schoolyards with the most beneficial organisms.”
- Nature and Environment