Jog
late Middle English (in the sense ‘stab, pierce’): variant of jag1.
wiktionary
Of uncertain origin. Originally with the meaning of "to shake up and down". Perhaps an early alteration of English shog(“to jolt, shake; depart, go”), from Middle English shoggen, schoggen(“to shake up and down, jog”), from Middle Dutch schocken(“to jolt, bounce”) or Middle Low German schoggen, schocken(“to shog”), ultimately from Proto-West Germanic *skokkan(“to move, shake, tremble”). More at shock.
Alternatively from Middle English joggen, a variant of jaggen(“to pierce, prod, stir up, arouse”).
etymonline
jog (v.)
1540s, "to shake up and down," perhaps altered from Middle English shoggen "to shake, jolt, move with a jerk" (late 14c.), a word of uncertain origin. Meanings "touch or push slightly," "stir up or stimulate by hint or push," and "walk or ride with a jolting pace" all are from 16c.
The modern sense in reference to running as training mostly dates from 1948; at first a regimen for athletes, it became a popular fad c. 1967. Perhaps this sense is extended from its use in horsemanship.
Jogging. The act of exercising, or working a horse to keep him in condition, or to prepare him for a race. There is no development in jogging, and it is wholly a preliminary exercise to bring the muscular organization to the point of sustained, determined action. [Samuel L. Boardman, "Handbook of the Turf," New York, 1910]
Related: Jogged; jogging.
jog (n.)
c. 1600, "act of moving up and down," from jog (v.). Meaning "a slight push or nudge" is from 1630s; meaning "a slow run for fitness or conditioning" is from 1977.
