Kay Glynn sent me her 13th annual Christmas greeting photo more than a week ago, writing: “I don’t even know what this picture means — but it was challenging and fun.” I know exactly what it means. Kay in her mid-60s has made a terrific comeback from hip replacement and resurfacing surgeries. She is showing how track is the fountain of youth and her flexibility and blond hair signal you can recapture past glories. In fact, masters tracksters likely sense holiday themes in our pursuits. Like Christmas, we see our sport as an athletic savior. Like Hanukkah, we see our…