Well it worked for rats. And looks pretty good for youth. But there need to be caveats. ?How many in middle age will respond to "a few minutes of intense exe

Well it worked for rats. And looks pretty good for youth. But there need to be caveats. ?How many in middle age will respond to "a few minutes of intense exercise to point of pain" with heart attack? ?What about mental health? Research findings in recent decades suggest something more sustained is needed for the endorphin boost that fights depression.