" Normally my run leaves me feeling like nothing but long muscles streaming with strength able and beckoning for more, anything, bring it on. That feeling is what gets me through my shift. Today the strength is nowhere. I'm lurching like a flabby first-timer; my legs drag like they're wrapped in wet sandbags, my arms flop and my breathing can't find a rhythm. I push harder, till my chest feels like it's ripping and a thick red seethes up over my eyes. I hang on to a lamppost, doubled over, waiting for it to clear. "
― Tana French , The Trespasser (Dublin Murder Squad, #6)