4 min / km is 84 min half marathon.... 6:30 miles 5 min / km is 105 minutes, or 8 minute miles (I might be a bit wrong-doing the quickly sums in my head Very few runners-even the elite athletes will run 100 km in a week (62 miles), and I think you are doing too much.
the central theme definition, the central theme meaning | English dictionary. Search also in: Web News Encyclopedia Images. central. adj. 1 in, at, of, from, containing, or forming the centre of something. the central street in a city, the central material of a golf ball. 2 main, principal, or chief; most important.
central idea (n.) 1. the central idea that is expanded in a document or discourse