Cu­ri­ous about why it's so much more ex­haust­ing to just run a bit faster I de­cid­ed to do the train­ing lap not run­ning, but walk­ing in my I-don't-know-when-my-train-leaves-but-I-don't-want-to-miss-it speed. Then it takes 36 min­utes (6.6 km/h), ver­sus 27 (8.9 km/h) when run­ning at a speed that makes me think I'm gonna die, or 30 (8 km/h) when run­ning at a speed that tries to avoid any flatlin­ing. So go­ing all an­a­lyt­i­cal on this stuff I see how easy it is to get loads of equip­ment and knowl­edge to tune some sched­ule into per­fec­tion. Then it's just one step up to adding nu­tri­tion, med­ica­tion and dope to the mix. I think I'll just stick with my vin­tage pair of Nike Air Force One mid-cut white/white's and match­ing Ca­sio.