If you haven’t heard about the minimum effective dose, a concept coined by Nautilus fitness creator Arthur Jones and popularized by lifestyle hacker Tim Ferriss in his book The Four Hour Body, here’s the simplest definition: the smallest dose that will produce the desired effect or outcome. For Jones, this was the minimum effective load, the point after which any additional resistance added to the bar would be redundant or even counterproductive to one’s strength and fitness goals. For Ferriss, the MED is about getting the most bang for your exercise and dietary buck.
A popular example is boiling water. If you want to boil a pot of water at standard air pressure, the MED is 212° F (100° C). Adding more heat is redundant and won’t make it “boil even more.”