Autophagy

Science Daily: What doesn't kill you makes you stronger - Research identifies cellular recycling process linked to beneficial effects of enduring mild stress

summary - New research could help explain why brief bodily stresses -- going to the sauna or for a run, for example -- are good for health and longevity. A study shows that the same cellular process, called autophagy, that's key for extending lifespan is also critical to the benefits of temporary stress.