delinquent noun [C]. âº a âperson, usually âyoung, who âbehaves in a way that is âillegal or not âacceptable to most âpeople: âjuvenile delinquents.
Sahelanthropus may have walked on two legs. The oldest evidence for walking on two legs comes from one of the earliest humans known, Sahelanthropus. Walking upright may have helped this species survive in the diverse habitats near where it livedâincluding forests and grasslands.
Research has shown that walking at speeds of 3.5 to 4.5 miles an hour - that's brisk walking, not strolling - produces cardiovascular benefits. A woman of average size can walk comfortably at brisk speeds of 3.5 to 4 miles an hour, while the average-sized man can walk at 4.5 to 5 miles per hour. Slower walking (2 miles per hour) can be advantageous for older people, cardiac patients, or people recuperating from illness.