Article continues below advertisementTiki Barber is embracing his 50s - and he says life only keeps getting better."I feel fantastic. I thought it was bad when I hit 50. It's even better when I hit 51, though," the former New York Giants running back exclusively tells OK! while dishing on his latest partnership with New Jersey Lottery. "I tell people I'm just getting wiser, not older. I stay in great shape to play with my young kids and live as full of life as I can."Looking back, Barber admits his perspective on aging has shifted significantly over time.