I think it's really interesting to mimic certain positive effects by various substances. One example would be Resveratrol, that mimics caloric restriction. For

I think it's really interesting to mimic certain positive effects by various substances. One example would be Resveratrol, that mimics caloric restriction. For exercise, the challenge seems to be quite hard (http://sydney.edu.au/news-opinion/news/2015/10/02/exercise-in-a-bottle-could-become-a-reality.html http://sydney.edu.au/news-opinion/news/2015/10/02/exercise-i...), but there can be seen some progress in animal models (https://www.washingtonpost.com/news/to-your-health/wp/2015/07/27/scientists-have-synthesized-new-compound-that-mimics-exercise-could-a-workout-pill-be-far-behind/?utm_medium=email&utm_source=digg&wprss=rss_homepage https://www.washingtonpost.com/news/to-your-health/wp/2015/0...).