With this I am not trying to invalidate the research. What I am doing is warning laypeople from drawing overly simplistic conclusions from studies like these, such as concluding that "Exercising hard is good".
There are a lot of studies on one side showing that high intensity training is probably better than developibg skill and efficiency for very moderate health goals and how an Olympic coach thinks lay people should train on the other. How much experience does an Olympic coach have with someone who wants to do less than 2000 calories of exercise a week for the rest of their life?