The Science Behind Nature vs. Exercise for Happiness

"Experiments of nature" and natural experiments, which involve studying individuals with rare genetic or acquired conditions or observing large populations exposed to environmental or behavioral stimuli, provide valuable insights into optimizing health and improving performance that randomized trials cannot. Examples include studying individuals with McArdle's disease to understand the lactate threshold and examining the health benefits of physical activity in London transport workers. These non-standard experiments generate hypotheses and complement traditional clinical trials, highlighting the importance of considering different types of evidence in scientific research.