This is a guest post from Todd Kuslikis of AShotofAdrenaline.net. Warning: Some of you are about to think I’m crazy. For those of you who haven’t heard of isometrics, this strength building concept is going to make you think I’ve officially walked off the deep end. Functional strength and awesome muscle mass gains with out even moving? This must be some kind of joke, right?

(This Mark's Daily Apple article was written by Mark Sisson, and is narrated by Brock Armstrong)