I am 44 yo, i tripped and fell hard to concrete floor at airport runing to catch shuttle, do i need to see dr, for someone at my age is it necessary to a dr? should i just walked it off, i just have minor bruises on elbow and thigh with some limping?

If you have no difficulty in moving your elbow, knee and hip other than a mild discomfort then fracture or significant joint injury is unlikely. You can observe the symptoms, they may get worse a little bit in the next 24 hours after the fall but they should ease up after 1-2 days. If symptoms persist or get worse then you should see a doctor by then. Good luck.