I've always prescribed to the principle that training makes us weak, and only rest makes us strong. But I've always suspected that rest alone is an over-simplification, hence the accepted abbreviation of R&R.
Different people take the expression R&R to mean different things, most assume it's "rest and relaxation", but perhaps the sportier minded prefer "....and recovery" instead.
So my Janathon of daily masochism finally reached a conclusion on Monday night, with a short(ish) run bringing my total distance run in January to a very satisfactory, and slightly mind-blowing 450 miles. With that particular episode of my life complete, I looked forward to a few days to "repair and recharge".
1. That simply "not running" doesn't really count, you have to get some sleep too.