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.
Definition of central. 1  1 : containing or constituting a center. 2  2 : of primary importance : essential, principal the central character of the novel. 3  3a : situated at, in, or near the center the central part of the stateb : easily accessible from outlying districts a central location for the new theater.